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Alopecia areata is a type of hair loss that affects the hair on the scalp or other areas of the body. It occurs when the immune system mistakenly attacks hair follicle roots, where hair growth begins.
It is most common in people younger than 20. But it can happen to children and adults of any age.
Medical treatments for alopecia areata may include medicines that are either put on the skin or injected. But because hair often grows back, treatment may not be needed.
Current as of: July 2, 2020
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine
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