What Is Asthma?
Asthma (AZ-ma) is a chronic (long-term) lung disease
that inflames and narrows the airways. Asthma causes recurring periods of
wheezing (a whistling sound when you breathe), chest tightness, shortness of
breath, and coughing. The coughing often occurs at night or early in the
morning.
Asthma affects people of all ages, but it most often
starts in childhood. In the United States, more than 22 million people are
known to have asthma. Nearly 6 million of these people are children.
Overview
The
airways
are tubes that carry air into and out of your lungs. People who have asthma
have inflamed airways. This makes the airways swollen and very sensitive. They
tend to react strongly to certain substances that are breathed in.
When the airways react, the muscles around them
tighten. This causes the airways to narrow, and less air flows to your lungs.
The swelling also can worsen, making the airways even narrower. Cells in the
airways may make more mucus than normal. Mucus is a sticky, thick liquid that
can further narrow your airways.
This chain reaction can result in asthma symptoms.
Symptoms can happen each time the airways are irritated.
Asthma
Figure A shows the location of the
lungs and airways in the body. Figure B shows a cross-section of a normal
airway. Figure C shows a cross-section of an airway during asthma symptoms.
Sometimes symptoms are mild and go away on their own
or after minimal treatment with an asthma medicine. At other times, symptoms
continue to get worse. When symptoms get more intense and/or additional
symptoms appear, this is an asthma attack. Asthma attacks also are called
flareups or exacerbations.
It's important to treat symptoms when you first
notice them. This will help prevent the symptoms from worsening and causing a
severe asthma attack. Severe asthma attacks may require emergency care, and
they can cause death.
Outlook
Asthma can't be cured. Even when you feel fine, you
still have the disease and it can flare up at any time.
But with today's knowledge and treatments, most
people who have asthma are able to manage the disease. They have few, if any,
symptoms. They can live normal, active lives and sleep through the night
without interruption from asthma.
For successful, comprehensive, and ongoing
treatment, take an active role in managing your disease. Build strong
partnerships with your doctor and other clinicians on your health care
team.
What Causes Asthma?
The exact cause of asthma isn't known. Researchers
think a combination of factors (family genes and certain environmental
exposures) interact to cause asthma to develop, most often early in life. These
factors include:
- An inherited tendency to develop allergies,
called atopy (AT-o-pe)
- Parents who have asthma
- Certain respiratory infections during
childhood
- Contact with some airborne allergens or exposure
to some viral infections in infancy or in early childhood when the immune
system is developing
If asthma or atopy runs in your family, exposure to
airborne allergens (for example, house dust mites, cockroaches, and possibly
cat or dog dander) and irritants (for example, tobacco smoke) may make your
airways more reactive to substances in the air you breathe.
Different factors may be more likely to cause asthma
in some people than in others. Researchers continue to explore what causes
asthma.
The "Hygiene Hypothesis"
One theory researchers have for what causes asthma
is the "hygiene hypothesis." They believe that our Western lifestylewith
its emphasis on hygiene and sanitationhas resulted in changes in our
living conditions and an overall decline in infections in early childhood.
Many young children no longer experience the same
types of environmental exposures and infections as children did in the past.
This affects the way that the immune systems in today's young children develop
during very early childhood, and it may increase their risk for atopy and
asthma. This is especially true for children who have close family members with
one or both of these conditions.
Who Is At Risk for Asthma?
Asthma affects people of all ages, but it most often
starts in childhood. In the United States, more than 22 million people are
known to have asthma. Nearly 6 million of these people are children.
Young children who have frequent episodes of
wheezing with respiratory infections, as well as certain other risk factors,
are at the highest risk of developing asthma that continues beyond 6 years of
age. These risk factors include having allergies, eczema (an allergic skin
condition), or parents who have asthma.
Among children, more boys have asthma than girls.
But among adults, more women have the disease than men. It's not clear whether
or how sex and sex hormones play a role in causing asthma.
Most, but not all, people who have asthma have
allergies.
Some people develop asthma because of exposure to
certain chemical irritants or industrial dusts in the workplace. This is called
occupational asthma.
What Are the Signs and Symptoms of Asthma?
Common asthma symptoms include:
- Coughing. Coughing from asthma is often worse at
night or early in the morning, making it hard to sleep.
- Wheezing. Wheezing is a whistling or squeaky
sound that occurs when you breathe.
- Chest tightness. This may feel like something is
squeezing or sitting on your chest.
- Shortness of breath. Some people who have asthma
say they can't catch their breath or they feel out of breath. You may feel like
you can't get air out of your lungs.
Not all people who have asthma have these symptoms.
Likewise, having these symptoms doesn't always mean that you have asthma. A
lung
function test, done along with a medical history (including type and
frequency of your symptoms) and physical exam, is the best way to diagnose
asthma for certain.
The types of asthma symptoms you have, how often
they occur, and how severe they are may vary over time. Sometimes your symptoms
may just annoy you. Other times they may be troublesome enough to limit your
daily routine.
Severe symptoms can threaten your life. It's vital
to treat symptoms when you first notice them so they don't become severe.
With proper treatment, most people who have asthma
can expect to have few, if any, symptoms either during the day or at night.
What Causes Asthma Symptoms To Occur?
A number of things can bring about or worsen asthma
symptoms. Your doctor will help you find out which things (sometimes called
triggers) may cause your asthma to flare up if you come in contact with them.
Triggers may include:
- Allergens found in dust, animal fur, cockroaches,
mold, and pollens from trees, grasses, and flowers
- Irritants such as cigarette smoke, air pollution,
chemicals or dust in the workplace, compounds in home décor products,
and sprays (such as hairspray)
- Certain medicines such as aspirin or other
nonsteroidal anti-inflammatory drugs and nonselective beta-blockers
- Sulfites in foods and drinks
- Viral upper respiratory infections such as
colds
- Exercise (physical activity)
Other health conditionssuch as runny nose,
sinus infections, reflux disease, psychological stress, and
sleep
apneacan make asthma more difficult to manage. These conditions need
treatment as part of an overall asthma care plan.
Asthma is different for each person. Some of the
factors listed may not affect you. Other factors that do affect you may not be
on the list. Talk to your doctor about the things that seem to make your asthma
worse.
How Is Asthma Diagnosed?
Your primary care doctor will diagnose asthma based
on your medical history, a physical exam, and results from tests. He or she
also will figure out what your level of asthma severity isthat is,
whether it's intermittent, mild, moderate, or severe. Your severity level will
determine what treatment you will start on.
You may need to see an asthma specialist if:
- You need special tests to be sure you have
asthma
- You've had a life-threatening asthma attack
- You need more than one kind of medicine or higher
doses of medicine to control your asthma, or if you have overall difficulty
getting your asthma well controlled
- You're thinking about getting allergy
treatments
Medical History
Your doctor may ask about your family history of
asthma and allergies. He or she also may ask whether you have asthma symptoms,
and when and how often they occur. Let your doctor know if your symptoms seem
to happen only during certain times of the year or in certain places, or if
they get worse at night.
Your doctor also may want to know what factors seem
to set off your symptoms or worsen them. For more information on what causes
asthma symptoms to occur, see
"What
Are the Signs and Symptoms of Asthma?"
Your doctor may ask you about related health
conditions that can interfere with asthma management. These conditions include
a runny nose, sinus infections, reflux disease, psychological stress, and
sleep
apnea.
Physical Exam
Your doctor will listen to your breathing and look
for signs of asthma or allergies. These signs include wheezing, a runny nose or
swollen nasal passages, and allergic skin conditions such as eczema.
Keep in mind that you can still have asthma even if
you don't have these signs on the day that your doctor examines you.
Diagnostic Tests
Lung Function Test
Your doctor will use a test called
spirometry
(spi-ROM-eh-tre) to check how your lungs are working. This test measures how
much air you can breathe in and out. It also measures how fast you can blow air
out. Your doctor also may give you medicines and then test you again to see
whether the results have improved.
If the starting results are lower than normal and
improve with the medicine, and if your medical history shows a pattern of
asthma symptoms, your diagnosis will likely be asthma.
Other Tests
Your doctor may order other tests if he or she needs
more information to make a diagnosis. Other tests may include:
- Allergy testing to find out which allergens
affect you, if any.
- A test to measure how sensitive your airways are.
This is called a bronchoprovocation test. Using spirometry, this test
repeatedly measures your lung function during physical activity or after you
receive increasing doses of cold air or a special chemical to breathe in.
- A test to show whether you have another disease
with the same symptoms as asthma, such as reflux disease, vocal cord
dysfunction, or sleep apnea.
- A
chest
x ray or an
EKG
(electrocardiogram). These tests will help find out whether a foreign object or
other disease may be causing your symptoms.
Diagnosing Asthma in Young Children
Most children who have asthma develop their first
symptoms before 5 years of age. However, asthma in young children (aged 0 to 5
years) can be hard to diagnose. Sometimes it can be difficult to tell whether a
child has asthma or another childhood condition because the symptoms of both
conditions can be similar.
Also, many young children who have wheezing episodes
when they get colds or respiratory infections don't go on to have asthma after
they're 6 years old. These symptoms may be due to the fact that infants have
smaller airways that can narrow even further when they get a cold or
respiratory infection. The airways grow as a child grows older, so wheezing no
longer occurs when the child gets a cold.
A young child who has frequent wheezing with colds
or respiratory infections is more likely to have asthma if:
- One or both parents have asthma
- The child has signs of allergies, including the
allergic skin condition eczema
- The child has allergic reactions to pollens or
other airborne allergens
- The child wheezes even when he or she doesn't
have a cold or other infection
A lung function test along with a medical history
and physical exam is the most certain way to diagnose asthma. However, this
test is hard to do in children younger than 5 years. Thus, doctors must rely on
children's medical histories, signs and symptoms, and physical exams to make a
diagnosis. Doctors also may use a 4 to 6 week trial of asthma medicines to see
how well a child responds.
How Is Asthma Treated and Controlled?
Asthma is a long-term disease that can't be cured.
The goal of asthma treatment is to control the disease. Good asthma control
will:
- Prevent chronic and troublesome symptoms such as
coughing and shortness of breath
- Reduce your need of quick-relief medicines (see
below)
- Help you maintain good lung function
- Let you maintain your normal activity levels and
sleep through the night
- Prevent asthma attacks that could result in your
going to the emergency room or being admitted to the hospital for
treatment
To reach this goal, you should actively partner with
your doctor to manage your asthma or your child's asthma. Children aged 10 or
olderand younger children who are ablealso should take an active
role in their asthma care.
Taking an active role to control your asthma
involves working with your doctor and other clinicians on your health care team
to create and follow an asthma action plan. It also means avoiding factors that
can make your asthma flare up and treating other conditions that can interfere
with asthma management.
An asthma action plan gives guidance on taking your
medicines properly, avoiding factors that worsen you asthma, tracking your
level of asthma control, responding to worsening asthma, and seeking emergency
care when needed.
Asthma is treated with two types of medicines:
long-term control and quick-relief medicines. Long-term control medicines help
reduce airway inflammation and prevent asthma symptoms. Quick-relief, or
"rescue," medicines relieve asthma symptoms that may flare up.
Your initial asthma treatment will depend on how
severe your disease is. Followup asthma treatment will depend on how well your
asthma action plan is working to control your symptoms and prevent you from
having asthma attacks.
Your level of asthma control can vary over time and
with changes in your home, school, or work environments that alter how often
you are exposed to the factors that can make your asthma worse. Your doctor may
need to increase your medicine if your asthma doesn't stay under control.
On the other hand, if your asthma is well controlled
for several months, your doctor may be able to decrease your medicine. These
adjustments either up or down to your medicine will help you maintain the best
control possible with the least amount of medicine necessary.
Asthma treatment for certain groups of people, such
as children, pregnant women, or those for whom exercise brings on asthma
symptoms, will need to be adjusted to meet their special needs.
Follow an Asthma Action Plan
You can work with your doctor to create a personal
written asthma action plan. The asthma action plan shows your daily treatment,
such as what kind of medicines to take and when to take them. The plan explains
when to call the doctor or go to the emergency room.
If your child has asthma, all of the people who care
for him or her should know about the child's asthma action plan. This includes
babysitters and workers at daycare centers, schools, and camps. These
caretakers can help your child follow his or her action plan.
See the National Heart, Lung, and Blood Institute's
(NHLBI's)
Asthma
Action Plan for a sample plan.
Avoid Things That Can Worsen Your Asthma
A number of common things (sometimes called asthma
triggers) can set off or worsen your asthma symptoms. Once you know what these
factors are, you can take steps to control many of them. (For more information
on asthma triggers, see
"What
Are the Signs and Symptoms of Asthma?")
For example, if exposure to pollens or air pollution
makes your asthma worse, try to limit time outdoors when the levels of these
substances are high in the outdoor air. If animal fur sets off your asthma
symptoms, keep pets with fur out of your home or bedroom. The NHLBI offers many
useful tips for
controlling
things that make your asthma worse. (See page 2 of NHLBI's Asthma Action
Plan.)
If your asthma symptoms are clearly linked to
allergies, and you can't avoid exposure to those allergens, then your doctor
may advise you to get allergy shots for the specific allergens that bother your
asthma. You may need to see a specialist if you're thinking about getting
allergy shots. These shots may lessen or prevent your asthma symptoms, but they
can't cure your asthma.
Several health conditions can make asthma more
difficult to manage. These conditions include runny nose, sinus infections,
reflux disease, psychological stress, and
sleep
apnea. Your doctor will treat these conditions as well.
Medicines
Your doctor will consider many things when deciding
which asthma medicines are best for you. Doctors usually use a stepwise
approach to prescribing medicines. Your doctor will check to see how well a
medicine works for you; he or she will make changes in the dose or medicine, as
needed.
Asthma medicines can be taken in pill form, but most
are taken using a device called an inhaler. An inhaler allows the medicine to
go right to your lungs.
Not all inhalers are used the same way. Ask your
doctor and other clinicians on your health care team to show you the right way
to use your inhaler. Ask them to review the way you use your inhaler at every
visit.
Long-Term Control Medicines
Most people who have asthma need to take long-term
control medicines daily to help prevent symptoms. The most effective long-term
medicines reduce airway inflammation.
These medicines are taken over the long term to
prevent symptoms from starting. They don't give you quick relief from symptoms.
Inhaled corticosteroids. Inhaled
corticosteroids are the preferred medicines for long-term control of asthma.
These medicines are the most effective long-term control medicine to relieve
airway inflammation and swelling that makes the airways sensitive to certain
substances that are breathed in.
Reducing inflammation helps prevent the chain
reaction that causes asthma symptoms. Most people who take these medicines
daily find they greatly reduce how severe symptoms are and how often they
occur.
Inhaled corticosteroids are generally safe when
taken as prescribed. They're very different from the illegal anabolic steroids
taken by some athletes. Inhaled corticosteroids aren't habit-forming, even if
you take them every day for many years.
But, like many other medicines, inhaled
corticosteroids can have side effects. Most doctors agree that the benefits of
taking inhaled corticosteroids and preventing asthma attacks far outweigh the
risks of side effects.
One common side effect from inhaled corticosteroids
is a mouth infection called thrush. You can use a spacer or holding chamber to
avoid thrush. A spacer or holding chamber is attached to your inhaler when
taking medicine to keep the medicine from landing in your mouth or on the back
of your throat.
Work with your health care team if you have any
questions about how to use a spacer or holding chamber. Rinsing your mouth out
with water after taking inhaled corticosteroids also can lower your risk of
thrush.
If you have severe asthma, you may have to take
corticosteroid pills or liquid for short periods to get your asthma under
control. If taken for long periods, these medicines raise your risk for
cataracts and osteoporosis (OS-te-o-po-RO-sis). A cataract is the clouding of
the lens in your eye. Osteoporosis is a disorder that makes your bones weak and
more likely to break.
Your doctor may have you add another long-term
control asthma medicine to lower your dose of corticosteroids. Or, your doctor
may suggest you take calcium and vitamin D pills to protect your bones.
Other long-term control medicines.
Other long-term control medicines include:
- Inhaled long-acting beta2-agonists. These medicines
open the airways and may be added to low-dose inhaled corticosteroids to
improve asthma control. An inhaled long-acting beta2-agonist
shouldn't be used alone.
- Leukotriene modifiers. These medicines are taken by mouth.
They help block the chain reaction that increases inflammation in your airways.
- Cromolyn and
nedocromil. These inhaled medicines also help prevent
inflammation and can be used to treat asthma of mild severity.
- Theophylline. This medicine is taken by mouth and helps open
the airways.
If your doctor prescribes a long-term control
medicine, take it every day to control your asthma. Your asthma symptoms will
likely return or get worse if you stop taking your medicine.
Long-term control medicines can have side effects.
Talk to your doctor about these side effects and ways to monitor or avoid them.
Quick-Relief Medicines
All people who have asthma need a quick-relief
medicine to help relieve asthma symptoms that may flare up.
Inhaled short-acting beta2-agonists are the first
choice for quick relief.
These medicines act quickly to relax tight muscles
around your airways when you're having a flareup. This allows the airways to
open up so air can flow through them.
You should take your quick-relief medicine when you
first notice your asthma symptoms. If you use this medicine more than 2 days a
week, talk with your doctor about how well controlled your asthma is. You may
need to make changes in your asthma action plan.
Carry your quick-relief inhaler with you at all
times in case you need it. If your child has asthma, make sure that anyone
caring for him or her and the child's school has the child's quick-relief
medicines. They should understand when and how to use them and when to seek
medical care for your child.
You shouldn't use quick-relief medicines in place of
prescribed long-term control medicines. Quick-relief medicines don't reduce
inflammation.
Track Your Asthma
To track your asthma, keep records of your symptoms,
check your peak flow number using a
peak
flow meter, and get regular asthma checkups.
Record Your Symptoms
You can record your asthma symptoms in a diary to
see how well your treatments are controlling your asthma.
Asthma is "well controlled" if:
- You have symptoms no more than 2 days a week and
they don't wake you from sleep more than 1 or 2 nights a month.
- You can carry out all your normal
activities.
- You take quick-relief medicines no more than 2
days a week.
- You have no more than one asthma attack a year
that requires you to take corticosteroids by mouth.
- Your peak flow doesn't drop below 80 percent of
your personal best number.
If your asthma isn't well controlled, contact your
doctor. He or she may need to change your asthma action plan.
Use a Peak Flow Meter
This small, hand-held device shows how well air
moves out of your lungs. You blow into the device and it gives you a score, or
peak flow number. Your score shows how well your lungs are working at the time
of the test.
Your doctor will tell you how and when to use your
peak flow meter. He or she also will teach you how to take your medicines based
on your score.
Your doctor and other clinicians on your health care
team may ask you to use your peak flow meter each morning and keep a record of
your results. It may be particularly useful to record peak flow scores for a
couple of weeks before each medical visit and take the results with you.
When first diagnosed with asthma, it's important to
find out your "personal best" peak flow number. To do this, you record your
score each day for a 2- to 3-week period when your asthma is under good
control. The highest number you get during that time is your personal best. You
can compare this number to future numbers to make sure your asthma is under
control.
Your peak flow meter can help warn you of an asthma
attack, even before you notice symptoms. If your score falls to a number that
shows that your breathing is getting worse, you should take your quick-relief
medicines the way your asthma action plan directs. Then you can use the peak
flow meter to check how well the medicine worked.
Get Asthma Checkups
When you first begin treatment, you will see your
doctor about every 2 to 6 weeks. Once your asthma is under control, your doctor
may want to see you anywhere from once a month to twice a year.
During these checkups, your doctor or nurse will ask
whether you've had an asthma attack since the last visit or any changes in
symptoms or peak flow measurements. You will also be asked about your daily
activities. This will help them assess your level of asthma control.
Your doctor or nurse also will ask whether you have
any problems or concerns with taking your medicines or following your asthma
action plan. Based on your answers to these questions, your doctor may change
the dose of your medicine or give you a new medicine.
If your control is very good, you may be able to
take less medicine. The goal is to use the least amount of medicine needed to
control your asthma.
Emergency Care
Most people who have asthma, including many
children, can safely manage their symptoms by following the steps for worsening
asthma provided in the asthma action plan. However, you may need medical
attention. Call your doctor for advice if:
- Your medicines don't relieve an asthma attack.
- Your peak flow is less than half of your personal
best peak flow number.
Call 911 for an ambulance to take you to
the emergency room of your local hospital if:
- You have trouble walking and talking because
you're out of breath.
- You have blue lips or fingernails.
At the hospital, you will be closely watched and
given oxygen and more medicines, as well as medicines at higher doses than you
take at home. Such treatment can save your life.
Asthma Treatment for Special Groups
The treatments described in this section generally
apply to all people who have asthma. However, some aspects of treatment differ
for people in certain age groups and those who have special needs.
Children
It's hard to diagnose asthma in children younger
than 5 years old. Thus, it's hard to know whether young children who wheeze or
have other asthma symptoms will benefit from long-term control medicines.
(Quick-relief medicines tend to relieve wheezing in young children whether they
have asthma or not.)
Doctors will treat infants and young children who
have asthma symptoms with long-term control medicines if the child's asthma
health assessment indicates that the symptoms are persistent and likely to
continue after 6 years of age. (For more information, see
"How
Is Asthma Diagnosed?")
Inhaled corticosteroids are the preferred treatment
for young children. Montelukast or cromolyn are alternative options. Treatment
may be given for a trial period of 1 month to 6 weeks. The treatment usually is
stopped if benefits aren't seen during that time and the doctor and parents are
confident the medicine was used properly.
Inhaled corticosteroids can possibly slow the growth
of children of all ages. If this slowed growth occurs, it usually is apparent
in the first several months of treatment, is generally small, and doesn't get
worse over time. Poorly controlled asthma also may reduce a child's growth
rate.
Most experts think the benefits of inhaled
corticosteroids for children who need them to control their asthma far outweigh
the risk of slowed growth.
Older Adults
Doctors may need to adjust asthma treatment for
older adults who take certain other medicines, such as beta blockers, aspirin
and other pain relievers, and anti-inflammatory medicines. These medicines can
prevent asthma medicines from working properly and may worsen asthma symptoms.
Be sure to tell your doctor about all of the
medicines you take, including over-the-counter medicines.
Older adults may develop weak bones from using
inhaled corticosteroids, especially at high doses. Talk to your doctor about
taking calcium and vitamin D pills and other ways to help keep your bones
strong.
Pregnant Women
Pregnant women who have asthma need to control the
disease to ensure a good supply of oxygen to their babies. Poor asthma control
raises the chance that a baby will be born early and have a low birth weight.
Poor asthma control can even risk the baby's life.
Studies show that it's safer to take asthma
medicines while pregnant than to risk having an asthma attack.
Talk to your doctor if you have asthma and are
pregnant or planning to get pregnant. Your level of asthma control may get
better or it may get worse while you're pregnant. Your health care team will
check your asthma control often and adjust your treatment as needed.
People Whose Asthma Symptoms Occur With Physical
Activity
Physical activity is an important part of a healthy
lifestyle. Adults need physical activity to maintain good health. Children need
it for growth and development.
In many people, however, physical activity may set
off asthma symptoms. If this happens to you or your child, talk to your doctor
about the best ways to control asthma so you can stay active.
The following medicines may help to prevent asthma
symptoms due to physical activity:
- Short-acting beta2-agonists
(quick-relief medicine) taken shortly before physical activity can last 2 to 3
hours and prevent exercise-related symptoms in most people who take them.
- Long-acting beta2-agonists can be
protective up to 12 hours. However, with daily use, they will no longer give up
to 12 hours of protection. Also, frequent use for physical activity may be a
sign that asthma is poorly controlled.
- Leukotriene modifiers. These pills are taken
several hours before physical activity. They help relieve asthma symptoms
brought on by physical activity in up to half of the people who take them.
- Cromolyn or nedocromil. These medicines are taken
shortly before physical activity to help control asthma symptoms.
- Long-term control medicines. Frequent or severe
symptoms due to physical activity may indicate poorly controlled asthma and the
need to either start or increase long-term control medicines that reduce
inflammation. This will help prevent exercise-related symptoms.
Easing into physical activity with a warmup period
also may be helpful. You also may want to wear a mask or scarf over your mouth
when exercising in cold weather.
If you use your asthma medicines as your doctor
directs, you should be able to take part in any physical activity or sport you
choose.
People Having Surgery
Asthma may add to the risk of having problems during
and after surgery. For instance, having a tube put into your throat may cause
an asthma attack.
Tell your surgeon about your asthma when you first
consult him or her. The surgeon can take steps to lower your risks, such as
giving you asthma medicines before or during surgery.
Can Asthma Be Prevented?
Currently, there isn't a way to prevent asthma from
starting in the first place. However, you can take steps to control the disease
and prevent its symptoms.
- Learn about your asthma and how to control
it.
- Follow your written asthma action plan. (See the
National Heart, Lung, and Blood Institute's
Asthma
Action Plan as a sample.)
- Use medicines as your doctor directs.
- Identify and avoid things that make your asthma
worse (as much as you can).
- Keep track of your asthma symptoms and level of
control.
- Get regular checkups for your asthma.
For more details about how to prevent asthma
symptoms and attacks, see
"How
Is Asthma Treated?"
Living With Asthma
Asthma is a long-term disease that requires
long-term care. Successful asthma treatment requires you to take an active role
in your care and follow your asthma action plan.
Learn How To Manage Your Asthma
Partner with your doctor to develop an
asthma
action plan. This plan will help you to properly take your medicines,
identify your asthma triggers, and manage your disease if asthma symptoms
worsen. Children aged 10 or olderand younger children who can handle
itshould be involved in developing and following their asthma action
plan.
Most people who have asthma can successfully manage
their symptoms at home by following their asthma action plans and having
regular checkups. However, it's important to know when to seek emergency
medical care.
Learn how to use your medicines correctly. If you
take inhaled medicines, you should practice using your inhaler at your doctor's
office. If you take long-term control medicines, take them daily as your doctor
prescribes.
Record your asthma symptoms as a way to track how
well your asthma is controlled. Also, you may use a
peak
flow meter to measure and record how well your lungs are working.
Your doctor may ask you to keep records of your
symptoms or peak flow results daily for a couple of weeks before an office
visit and bring these records with you to the visit. (For more information on
using a peak flow meter, see
"How
Is Asthma Treated?")
These steps will help you keep track over time of
how well you're controlling your asthma. This will help you spot problems early
and prevent or relieve asthma attacks. Recording your symptoms and peak flow
results to share with your doctor also will help him or her decide whether to
adjust your treatment.
Ongoing Care
Have regular asthma checkups with your doctor so he
or she can assess your level of asthma control and adjust your treatment if
needed. Remember, the main goal of asthma treatment is to achieve the best
control of your asthma using the least amount of medicine. This may require
frequent adjustments to your treatments.
If it's hard to follow your plan or the plan isn't
working well, let your health care team know right away. They will work with
you to adjust your plan to better suit your needs.
Get treatment for any other conditions that can
interfere with your asthma management.
Watch for Signs That Your Asthma Is Getting
Worse
Your asthma may be getting worse if:
- Your symptoms start to occur more often, are more
severe, and/or bother you at night and cause you to lose sleep.
- You're limiting your normal activities and
missing school or work because of your asthma.
- Your peak flow number is low compared to your
personal best or varies a lot from day to day.
- Your asthma medicines don't seem to work well
anymore.
- You have to use your quick-relief inhaler more
often. If you're using quick-relief medicine more than 2 days a week, your
asthma isn't well controlled.
- You have to go to the emergency room or doctor
because of an asthma attack.
If you have any of these signs, see your doctor. He
or she may need to change your medicines or take other steps to control your
asthma.
Partner with your health care team and take an
active role in your care. This can help control asthma so it doesn't interfere
with your activities and disrupt your life.
Key Points
- Asthma is a chronic (long-term) lung disease that
inflames and narrows the airways and makes them more reactive to certain
substances breathed in. The exact cause of asthma isn't known.
- Asthma affects people of all ages, but it most
often starts in childhood. In the United States, more than 22 million people
are known to have asthma. Nearly 6 million of these people are children.
- Asthma causes recurring periods of wheezing (a
whistling sound when you breathe), chest tightness, shortness of breath, and
coughing. The coughing often occurs at night or early in the morning.
- Sometimes symptoms are mild and go away on their
own or after minimal treatment with an asthma medicine. Other times, the
symptoms continue to get worse. When symptoms get more intense and/or
additional symptoms appear, this is an asthma attack.
- It's important to treat asthma symptoms when you
first notice them. This will help prevent the symptoms from worsening and
causing a severe attack. Severe asthma attacks may require emergency care, and
they can cause death.
- Your doctor will diagnose asthma based on your
medical history, a physical exam, and results from tests. Asthma is difficult
to diagnose in children younger than 5 years old.
- There's no cure for asthma. Asthma is a long-term
disease that requires long-term care. Successful asthma treatment requires you
to take an active role in your care. Learn how to manage your asthma, get
ongoing care, and watch for signs that your asthma is getting worse.
- The goal of asthma treatment is to control the
disease by following the asthma action plan you create with your doctor, taking
asthma medicines as prescribed, learning what things make your asthma worse and
taking steps to avoid exposure to them, tracking your level of asthma control,
and responding quickly to worsening symptoms.
- Asthma is treated with two types of medicines:
long-term control medicines and quick-relief medicines. You use a device called
an inhaler to take many of these medicines. This device allows the medicine to
go right to your lungs.
- The amounts and types of medicine you need to
treat your asthma depend on how well controlled your asthma is when you're
closely following your asthma action plan. This may change over time.
- Call 911 for an ambulance to take you
to the emergency room of your local hospital if you have trouble walking and
talking because you're out of breath or you have blue lips or fingernails.
- Track your asthma by recording your symptoms,
using a
peak
flow meter, and getting regular asthma checkups. Let your doctor know if
your asthma is getting worse.
- Some aspects of treatment differ for people in
certain age groups or those who have special needs. See
"How
Is Asthma Treated?" for more information on treatment for special
groups.
- Most people who have asthma are able to manage
the disease. They have few, if any, symptoms and can live normal, active lives.
Links to Other Information About Asthma
NHLBI Resources
Non-NHLBI Resources
Clinical Trials
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