Adolescent gynecomastia is usually associated with hormone disorders and requires hormone modification therapy, while adult gynecomastia carries the risk of breast cancer and is usually treated with surgery. If breast enlargement occurs in late puberty, parents need to take the patient to the hospital to check whether there is any abnormality in his hormone level, and then carry out targeted treatment. As for adult males or males whose puberty has ended, if breast development has reached a long period of time and cannot be relieved on its own, and brings obvious influence to their work and study, only through surgery can the problem be solved fundamentally. If breast enlargement is relatively fast in a short period of time, or if nodules appear in the breast, it will be suspected that there is a risk of breast disease, and it is necessary to consult a doctor as soon as possible for surgical excision treatment. Therefore, once male breast development occurs, it is necessary to consult a doctor in time and follow the doctor’s instructions for treatment.