Shedding in men is actually called seborrheic alopecia or androgenetic alopecia. It is characterized by a receding hairline and a progressive reduction in hair, thinning and becoming thin and soft. There are two main reasons for its development: 1. Genetic factors. In clinical practice, it is often found that the patient will have hair loss in his 20s, and upon careful inquiry, his family members have a similar medical history, probably the patient’s parents, grandma, grandpa, grandma have a history of this kind of hair loss, that is, a family history. 2, androgens. Androgens play a very important role in the hair loss process. Because it acts to one of the enzymes, it causes hair loss, fine and soft. Therefore, the shedding of hair in men may be androgenic alopecia. Its causes mainly consider the above two aspects, of course, the usual diet, stay up late, may also aggravate the loss of hair.