If a patient has hair loss on both sides of the forehead, it is possible that the patient has seborrheic alopecia, because the early stage of seborrheic alopecia is mainly the loss of hair in this area, in the early stage of hair loss may only be manifested as a gradual thinning of hair, and eventually gradually thinning, also called the hairline upward. For this type of hair loss, the specific reason for its formation may be related to the fact that the patient has certain hereditary factors, and most patients with this condition have a clear familial predisposition. In addition, people with this hereditary susceptibility gene may also suffer from aggravation of hair loss under some triggering conditions, such as due to staying up late or eating barbecue frequently or being fatigued frequently, which may lead to aggravation of seborrheic alopecia.