Celiac disease is characterized by a severe reaction to gluten. The lining of the small intestine is damaged by chronic inflammation,...

Alopecia areata is a condition resulting in sudden hair loss that starts with one or more circular bald patches on the scalp or elsewhere...

A migraine isn't your average headache. Migraine headaches are sometimes preceded by warning symptoms. Triggers include hormonal changes,...

Heavy sweating (hyperhidrosis) is abnormally excessive sweating that's not necessarily related to heat or exercise. This condition can...