Hair loss at the back of the head may be caused by spot baldness, androgenetic alopecia, Brock’s pseudo-patch baldness, etc. The main treatment for different causes is to use drugs and physical therapy. 1. Pemphigus vulgaris: it is a kind of mental factor-led, autoimmune and other related diseases, the treatment is mainly general treatment, local drug treatment, systemic treatment or phototherapy. Patients should pay attention to more rest, keep a happy mood, can be applied locally Minoxidil or glucocorticoids, systemic medication can choose vitamin B, calcium pantothenate, etc. to help hair growth, but also can be used in phototherapy such as long-wave ultraviolet light and other treatments. 2. Androgenetic alopecia: it is related to the increase of androgen secretion. Systemic medication such as oral finasteride can be used, topical medication such as minoxidil can be used, and hair transplantation can also be used. 3. Brock’s pseudo-patch baldness: the cause is unknown, there is no clear and effective treatment. There are more reasons for hair loss, you should go to the hospital to find out the reasons in time and choose the appropriate treatment under the guidance of professional doctors.