Alopecia areata
Alopecia areata (Alopecia areata) is a sudden, localized patchy hair loss. The lesions were normal on the scalp, without inflammation and conscious symptoms. The course of the disease is slow, and it can relieve itself and relapse. If the entire scalp hair is completely shed, it is called alopecia totalis; if all the hair is shed, it is called alopecia universalis.
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