Male pattern baldness may be caused by androgenetic alopecia, patchy baldness, heredity and so on. 1. Androgenetic alopecia: This kind of hair loss is mainly characterized by excessive oil secretion from the patient’s scalp, accompanied by symptoms of hair loss. Androgens gather in the blood of the scalp and increase in concentration, which can lead to shortening of the hair growth cycle, hair becoming thin and short, and hair loss. 2. Patch baldness: Patch baldness is a kind of limited patchy baldness that occurs suddenly on the head, which manifests itself as localized normal skin, normal skin at the place of hair loss, and no self-conscious symptoms. 3. Heredity: If the patient has a family history of hair loss, i.e., there are patients with similar hair loss in the family, the phenomenon of hair loss may also occur. In addition, it is recommended to go to the hospital in time to find out the cause of hair loss and follow the doctor’s instructions for treatment to avoid delaying the condition.