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Common cold

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Contents of this page:

Illustrations

Throat anatomy
Throat anatomy
Cold symptoms
Cold symptoms
Antibodies
Antibodies

Alternative Names    Return to top

Upper respiratory infection - viral; Cold

Definition    Return to top

The common cold generally involves a runny nose, nasal congestion, and sneezing. You may also have a sore throat, cough, headache, or other symptoms. Over 200 viruses can cause a cold.

Causes    Return to top

We call it the “common cold” for good reason. There are over one billion colds in the United States each year. You and your children will probably have more colds than any other type of illness. Children average three to eight colds per year. They continue getting them throughout childhood. Parents often get them from the kids. Colds are the most common reason that children miss school and parents miss work.

Children usually get colds from other children. When a new strain is introduced into a school or day care, it quickly travels through the class.

Colds can occur year-round, but they occur mostly in the winter (even in areas with mild winters). In areas where there is no winter, colds are most common during the rainy season.

When someone has a cold, their runny nose is teeming with cold viruses. Sneezing, nose-blowing, and nose-wiping spread the virus. You can catch a cold by inhaling the virus if you are sitting close to someone who sneezes, or by touching your nose, eyes, or mouth after you have touched something contaminated by the virus.

People are most contagious for the first 2 to 3 days of a cold, and usually not contagious at all by day 7 to 10.

Symptoms    Return to top

The three most frequent symptoms of a cold are:

Adults and older children with colds generally have minimal or no fever. Young children, however, often run a fever around 100-102°F.

Once you have "caught" a cold, the symptoms usually begin in 2 or 3 days, though it may take a week. Typically, an irritated nose or scratchy throat is the first sign, followed within hours by sneezing and a watery nasal discharge.

Within one to three days, the nasal secretions usually become thicker and perhaps yellow or green. This is a normal part of the common cold and not a reason for antibiotics.

Depending on which virus is the culprit, the virus might also produce:

Still, if it is indeed a cold, the main symptoms will be in the nose.

For children with asthma, colds are the most common trigger of asthma symptoms.

Colds are a common precursor of ear infections. However, children's eardrums are usually congested during a cold, and it's possible to have fluid buildup without a true bacterial infection.

The entire cold is usually over all by itself in about 7 days, with perhaps a few lingering symptoms (such as cough) for another week. If it lasts longer, see your doctor to rule out another problem such as a sinus infection or allergies.

Treatment    Return to top

Get plenty of rest and drink lots of fluids. Over-the-counter cold remedies may help ease your symptoms. These won't actually shorten the length of a cold, but can help you feel better.

NOTE: Medical experts have recommended against using cough and cold drugs in children under age 6. Talk to your doctor before your child takes any type of over-the-counter cough medicine, even if it is labeled for children. These medicines likely will not work for children, and they may have serious side effects.

Antibiotics should not be used to treat a common cold. They will not help and may make the situation worse. Thick yellow or green nasal discharge is not a reason for antibiotics, unless it doesn't get better within 10 to 14 days. (In this case, it may be sinusitis.)

New antiviral drugs could make runny noses completely clear up a day sooner than usual (and begin to ease the symptoms within a day). It’s unclear whether the benefits of these drugs outweigh the risks.

Chicken soup has been used for treating common colds at least since the 12th century. It may really help. The heat, fluid, and salt may help you fight the infection.

Outlook (Prognosis)    Return to top

The symptoms usually go away in 7 to 10 days.

Possible Complications    Return to top

When to Contact a Medical Professional    Return to top

Try home care measures first. Call your health care provider if:

Prevention    Return to top

It might seem overwhelming to try to prevent colds, but you can do it. Children average three to eight colds per year. It is certainly better to get three than eight!

Here are five proven ways to reduce exposure to germs:

Here are seven ways to support the immune system:

References    Return to top

Long, SS, Pickering, LK, and Prober, CG, eds. Principles and Practice of Pediatric Infectious Diseases. 2nd ed. New York, NY: Elsevier; 2003.

Mandell GL, Bennett JE, Dolin R, eds. Principles of Infectious Diseases. 5th ed. New York, NY: Churchill Livingstone; 2000.

Noble J, ed. Textbook of Primary Care Medicine. 3rd ed. St. Louis, Mo: Mosby; 2001.

This article uses information by permission from Alan Greene, M.D., © Greene Ink, Inc.

Update Date: 1/18/2008

Updated by: David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. Previously reviewed by D. Scott Smith, MD, MSc, DTM&H, Chief of Infectious Disease & Geographic Medicine, Kaiser Redwood City, CA & Adjunct Assistant Professor, Stanford University. Review provided by VeriMed Healthcare Network (8/8/2006).

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