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Overview

Alopecia areata is a common type of hair loss that affects approximately 2% of the population, or more than 4 million people in the United States. It affects both men and women, predominately children and young adults, but it can also develop in older adults. It usually starts out as smooth, small, round or oval patches of baldness that rapidly form on one side of the head.

The edges of the patches are usually studded with "exclamation point hairs." Erythema (inflammatory red...Read the full article