Nutrition basics
Learning Center
Blocked tear duct
Watery, irritated eyes may occur when your tears can't drain normally. Learn about this common eye condition that affects newborns and sometimes, adults.
Bladder cancer
Blood in the urine (hematuria) sometimes is a sign of bladder cancer. Learn about other bladder cancer signs and symptoms and explore treatment options.
Bicuspid aortic valve
This condition, present at birth, affects the valve between the lower left heart chamber and the body's main artery. Know the symptoms and treatment.
Benign prostatic hyperplasia (BPH)
This common problem, also known as an enlarged prostate, can be treated.
Bedsores (pressure ulcers)
These areas of damaged skin and tissue are caused by sustained pressure — often from a bed or wheelchair — that reduces blood flow to vulnerable areas of the body.
Basal cell carcinoma
Learn about symptoms, treatment and prevention of this common skin cancer that often occurs on the head and neck.
Bartholin's cyst
A Bartholin's cyst is a fluid-filled lump near the vaginal opening. It's rarely serious, but when infected, it can be painful.
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Atypical hyperplasia of the breast
Learn how a diagnosis of atypical lobular hyperplasia or atypical ductal hyperplasia affects your risk of breast cancer and what you can do.
Atrial fibrillation
A fast, pounding heartbeat could be due to AFib, a type of heart rhythm problem. Know the warning signs and when treatment is needed.
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