Patchy baldness may be hereditary. Patch baldness, commonly known as “ghost shaving”, “oil wind” and so on, is a kind of hair in the scalp part of the sudden occurrence of confined patch-like loss, serious or even all the loss, the affected area is clear boundary, local hair loss, no scar or inflammatory reaction and so on. Currently, it is believed that the basic cause of baldness is immune dysfunction or heredity, in addition to other triggering factors, such as mental and psychological factors, viruses, vaccines, etc. The results of existing studies have shown that 2% of hair loss is caused by immune dysfunction. Existing studies have shown that 25% of patients with this disease have a family history of the disease. In addition, studies have shown that identical twins with identical genomes are significantly more likely to develop the disease than fraternal twins, suggesting that baldness is genetically linked. The diagnosis and treatment of Pemphigus vulgaris requires the judgment of a medical professional. If you feel unwell, it is recommended that you visit a professional medical institution in a timely manner.