Although the exact etiology of alopecia areata is unknown, it is accepted that it is an organ-specific autoimmune disease in a genetically predisposed individuals, which is triggered by different environmental factors like emotional stress, anemia, parasitic infestations, and thyroid disorders.Alopecia areata (AA), an autoimmune condition, characterized by a chronic remitting-relapsing course of patchy hair loss, affects approximately 2.1% of the population. It typically presents with sharply demarcated round patches of hair loss and may present at any age,AA is the second-most frequent non-scarring alopecia, after male and female pattern alopecia

Alopecia Areata