An autoimmune disorder which causes patches of baldness usually circular. The number of spots vary with severity of disease. There are four forms: Alopecia areata totalis (complete hair loss on head), Alopecia areasta universalis (hair loss all over body), Diffuse alopecia areata (thinning of hair and then loss in patches) and Ophiasis alopecia areata (hair loss in the form of a band around head). Alopecia areata is considered to be genetic condition is seen accompanying with: positive family history, asthma, down's syndrome, pernicious anemia, allergic rhinitis, thyroid conditions and vitiligo. Progression of the disease is as follows: small bald spots develop in areas with hair, patches get larger in area, hair may grow back and fall out again and the area is very smooth with no redness or rash. Nails of the effected person become brittle and pitted. Diagnosis is usually clinical and made on examination of effected area and nails. There is no cured completely but treatment options like corticosteroids and topical immunotherapy may be used. Corticosteroid have anti-inflammatory effects reducing the immune effect. Topical immunotherapy fight back by producing a localized allergic reaction and then stimulate hair growth back.