Fitness basics
Learning Center
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Rumination syndrome
Learn about this condition that results in regurgitating and reswallowing food. Behavioral therapy and medicine are treatments.
Jaw surgery
Jaw surgery corrects irregularities of the jaw bones and realigns the jaws and teeth to improve the way they work and it often improves appearance.
Intraoperative magnetic resonance imaging (iMRI)
Find out how neurosurgeons use intraoperative magnetic resonance imaging (iMRI) during brain surgery.
Rectal prolapse
This rare condition happens when the rectum slips outside of the anus. Find out about symptoms and treatment.
Vaginal odor
Learn about causes of unpleasant or unusual odor from the vagina and when to seek care.
Vaginal bleeding after sex
This symptom might not require a checkup. But if you've gone through menopause, contact your health care team to find out the cause of bleeding from the vagina.
Breast rash
Overview covers the definition and possible causes of breast rashes.
Breast calcifications
Most breast calcifications are benign. Find out more about what can cause them, what they look like, and when to see a doctor.
Pelvic pain
This type of pain can be dull or sharp. You may feel it all the time or only sometimes. Learn about possible causes and when to seek care.
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