The etiology of male seborrheic alopecia has not been completely clarified, and current research suggests that its development is mainly related to genetics and androgen metabolism. Genetic factors can come from the paternal line, including the patient’s father and grandfather, or from the maternal line, such as the patient’s maternal grandfather and maternal uncle, and the patient’s androgen level may be normal. In the hair loss area of male seborrheic alopecia patients, the hair follicles and sebaceous glands are more sensitive to androgens. Under the action of androgens, the hair follicles become smaller and smaller, and the hair is fine leading to the inability to grow, and a large amount of sebum is produced, leading to greasy skin and hair and easy dandruff.