Health Topics A–Z
Health Topics by Category
![Arthritis is a type of rheumatic disease. Rheumatic diseases usually affect joints, tendons, ligaments, bones, and muscles.](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-arthritis-rheumatic.png)
Arthritis and Rheumatic Diseases
Arthritis is often used to refer to any disorder that affects the joints. Rheumatic diseases usually affect joints, tendons, ligaments, bones, and muscles.![Muscle and bone diseases](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-muscle-bone-diseases_0.png)
Muscle and Bone Diseases
The musculoskeletal system consists of the body's bones, muscles, tendons, ligaments, joints, and cartilage.![Group of young adults sitting together outdoors.](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-skin-diseases_0.png)
Skin Diseases
Allergies, irritants, genetic makeup, certain diseases, and immune system problems can cause skin conditions.Initiatives and Resources
![Young woman smiling for a photo.](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/sample_thumbnail.jpg)
Portal en español
Find free health information on conditions of the bones, joints, muscles, and skin.![Bones icon](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-bones-site.jpg)
NIH Osteoporosis and Related Bone Diseases ~ National Resource Center
Learn how to promote good bone health.![Elderly woman talking with doctor about medication.](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-outreach.jpg)
Community Outreach
Get the toolkit and free resources to help spread the word.![Asian Language Resources](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-asian-language_0.jpg)
Asian Language Resources
Find free resources about bones, joints, muscles, and skin.![Kids and Their Bones](https://webarchive.library.unt.edu/web/20201218004714im_/https://www.niams.nih.gov/sites/default/files/images/thumbnails/thumb-small-kids.png)
Kids Pages
Childhood and teen years are a prime time to learn habits that will help you keep your bones, joints, muscles, and skin healthy.Explore NIH Patient Resources
MedlinePlus:
Find trusted information on health, wellness, and more in both English and Spanish (Español).
Pillbox:
Identify unknown pills and get links to the drug label, safety information, and more.
Explore NIH Research
ClinicalTrials.gov:
Find federally and privately supported research using volunteers.
PubMed Central:
Search the archive of life sciences journals.
Research Portfolio Online Research Tools (RePORT)
Search research projects and follow links to research spending and other reports.
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Many of our publications are available to view and download. You can also order some in print. Search our publications catalog.