Alopecia Areata is an autoimmune disease of the hair initially appearing as a rounded bare patch about an inch across. Often observed in childhood, this type of hair loss affects both men and women.

There are mainly three type of Alopecia Areata named according to the totality of hair loss.

• Alopecia Areata is a mild patchy hair loss on the scalp
• Alopecia Totalis is the total loss of hair.
• Alopecia Universalis is the complete loss of scalp and body hair