Teen health
Learning Center
Video: An asthma attack
What happens to your airways during an asthma attack?
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Bleeding after menopause: A concern?
It's unusual to bleed from the vagina after menopause. Learn what health problems can cause it and why you need to see your health care provider.
Concussion
This brain injury can cause headaches, dizziness, trouble concentrating and other symptoms that often improve within days to weeks.
Breast lump or breast changes: Early evaluation is essential
Find out how a breast lump or breast change is evaluated for breast cancer.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
COVID-19, cold, allergies and the flu: What are the differences?
Knowing if you have COVID-19, a cold, the flu or seasonal allergies isn't easy. Find out about the differences between these illnesses.
Vaginal odor
Learn about causes of unpleasant or unusual odor from the vagina and when to seek care.
Vaginal bleeding
Bleeding from your vagina that's different from your period might signal a problem. Learn about possible causes and when you should see a doctor.
Rheumatoid arthritis: Does pregnancy affect symptoms?
Learn how pregnancy can affect rheumatoid arthritis symptoms.
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