Alopecia areata



Alopecia areata

Alopecia areata is a type of hair loss that occurs when your immune system mistakenly attacks hair follicles , which is where hair growth begins. The damage to the follicle is usually not permanent. Experts do not know why the immune system attacks the follicles.


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30,400 persons

Source: Journal of thrombosis and haemostasis

Typical Age of onset

Childhood - Age 3
Adult - 35


Easy or excessive bruising (purpura)
Rash - pinpoint-sized reddish-purple spots (petechiae) usually on the lower legs
Bleeding from the gums or noseBlood in urine or stools
Unusually heavy menstrual flow

Sources:  Mayo Clinic, Healthline

Professional Associations