Alopecia areata is a hair-loss condition which usually affects the scalp. It can, however, sometimes affect other areas of the body. Hair loss tends to be rather rapid and often involves one side of the head more than the other.
Alopecia areata affects both males and females. This type of hair loss is different than male-pattern baldness, an inherited condition.
Current evidence suggests that alopecia areata is caused by an abnormality in the immune system. This particular abnormality leads to autoimmunity. As a result, the immune system attacks particular tissues of the body.
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