The prognosis of pemphigus vulgaris varies from person to person, and 35% to 50% of mild cases may resolve spontaneously within 1 year. 1. Patchy baldness is a common non-scarring inflammatory alopecia. The main symptom is alopecia areata, which is characterized by sudden patchy alopecia of the scalp. The alopecia areata can be oval, single or multiple, and the alopecia areata varies in size and is mainly seen in the hair, with clear boundaries, and the appearance of the rest of the skin is basically normal. Often there are no obvious self-conscious symptoms, mostly found unintentionally. 2.35%~50% of patients with mild baldness can be cured within 1 year, and most of the patients need to be cured after treatment, but there are still some patients with alternating remission and relapse, and there are also 14%~25% of patients with persistent or progressing condition to total baldness or generalized baldness, which may result in lifelong baldness. It is recommended that patients with pemphigus vulgaris go to the hospital in time and receive standardized treatment under the guidance of a doctor to avoid delaying their condition.