Staying healthy
Learning Center
Traumatic brain injury
If a head injury causes a mild traumatic brain injury, long-term problems are rare. But a severe injury can mean significant problems.
Umbilical hernia
Learn about this condition in which your intestines create a bulge near your navel.
Viral gastroenteritis (stomach flu)
This condition, often called stomach flu, is usually harmless, except for infants and people with immunosuppression. Symptoms can usually be managed.
Whooping cough
Learn more about the symptoms, causes, treatment of this highly contagious, vaccine-preventable lung infection.
Video: Allergy tests
What happens in an allergy test? Watch this video and find out.
Video: Colonoscopy
See what a doctor sees when you undergo an examination of your colon.
Video: Sentinel node biopsy for melanoma
Video shows sentinel node biopsy to determine whether melanoma has spread.
Video: Skin cancer — How skin cancer develops
Watch this video to see what melanoma and nonmelanoma skin cancers look like and how they develop.
Video: Endoscopy
An endoscopy allows your doctor to view your esophagus, stomach and part of the small intestine. Here's how it works.
Body lice
Body lice are tiny insects that live in your clothing and feed on your blood. Find out how to treat and prevent this itchy nuisance of a bug.
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