Gynecomastia, also known as gynecomastia, has a prevalence of 40%-50% in the normal population and is now a common condition. The treatment of gynecomastia mostly uses the minimally invasive technique of areolar incision, through a combination of liposuction and transmastectomy, with only a small incision of one-third of the arc of the areola margin, that is, the entire operation is completed, and the recovery is quick, and you can usually be discharged from the hospital in about 3 days for normal work life. Because the scar is located at the junction of the areola pigment and normal skin, the scar is very inconspicuous and the result is ideal. The most important concern of patients after surgical treatment is whether gynecomastia will recur? Is the effect of surgical excision a permanent one? The causes of gynecomastia include genetics, endocrine, tumor, drugs, diet, etc. To put it simply, the absolute or relative increase of estrogen level in the body and the increased sensitivity of breast tissue to estrogen. Normally, male testes produce not only androgens but also estrogen, and estrogen and androgen maintain a certain ratio in the body. If this balance is disturbed for some reason, excess estrogen can stimulate the growth of breast ducts, which can lead to male breast disease. The target organ for estrogen is the breast tissue. Through male mastectomy, most of the breast tissue has been removed, leaving only a small amount of the thin layer of breast gland below the areola to ensure the blood supply to the nipple areola. Even if hormonal changes occur again, it is difficult for the small amount of areola tissue to develop significantly, just as it is difficult for a small amount of seed to produce a good yield even if it grows well when planted. Therefore, it is extremely difficult for recurrence to occur after male mastectomy. However, it is a different story if malignant tumors occur.