Alopecia areatahttps://en.wikipedia.org/wiki/Alopecia_areata
Alopecia areata is a localized condition in which hair is lost from the body. Often, it results in a few bald spots on the scalp, each about the size of a coin. The disease may be caused by psychological stress.

Alopecia areata is believed to be an autoimmune disease related with the immune system of the hair follicles. The underlying mechanism involves failure by the body to recognize its own cells, with subsequent immune-mediated destruction of the hair follicle.

Treatment ― OTC Drugs
Some people with mild alopecia areata recover within a year without treatment. However, most people experience recurrences at random sites on the scalp.
#Hydrocortisone cream

Treatment
Intralesional steroid injections are the most effective treatment. Immunotherapy can be tried if large areas of the scalp are affected.
#Triamcinolone intralesional injection
#DPCP immunotherapy
  • Alopecia areata is seen on the back of the scalp. In typical cases, it appears suddenly with a completely smooth surface and a size of 2-3 cm.
  • Multiple circular hair loss