Patch area like baldness area on the head is rarely common skin disease in bangladesh .This disease is mainly responsible for autoimmune reaction & affected on own cell that’s result irregularly acted on hair shaft.Patch may affects on different area of the body such as beard,pubic hair in male or female patient .This disease is differentiated by dermatography & Biopsy certainly like as Tinia barbie .This disease is commonly reacted with own cell.
