Fitness basics
Learning Center
Canker sore
Canker sore — Learn about the causes, treatment and prevention of this painful mouth sore.
Brugada syndrome
Learn about the symptoms, causes and treatments for this heart rhythm condition that is sometimes inherited.
Bronchitis
Bronchitis is an inflammation of the tubes that carry air to and from the lungs. Coughing and shortness of breath are the major symptoms.
Broken nose
A broken nose can cause pain, swelling and bruising around your nose and eyes. Surgery usually isn't necessary.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Broken arm
Treatment depends on the site and severity of the injury. Simple breaks might be treated with a sling and ice. Complicated fractures may require surgery.
Breast cysts
A firm, round lump in breast tissue could be a fluid-filled cyst. Typically not cancerous, breast cysts often need no treatment.
Breast cancer
Learn about this common cancer, including information on prevention, symptoms, diagnosis and treatment.
Brachial plexus injury
Learn about these nerve injuries that usually result from auto or motorcycle accidents, and find out which procedures can help restore arm function.
Bone metastasis
Learn about the symptoms and causes of cancer that spreads to the bones. Find out about treatments, including medications, radiation and surgery.
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