It is understood that the etiology of male breast development is mostly unknown, and a few patients may be caused by endocrine disorders. Due to the coexistence of male mammary gland hyperplasia and congenital testicular hypoplasia, some patients have female characteristics. Male mammary gland hyperplasia can also be seen in patients with abnormal liver function, vitamin B deficiency and some patients who have received hormone therapy for a long time. Histologically, male mammary gland hyperplasia is different from female mammary gland, because there are no glandular lobules secreting milk, only fibrous tissue and adipose tissue of mammary duct proliferate, and mammary duct cystic enlargement. Surgical correction can be considered for patients with excessive retraction after adulthood, which affects their physical beauty and increases their psychological burden. The operation was performed under local anesthesia. Make a semi-circular incision at the lower edge of areola to remove the hyperplastic breast tissue. If there is too much skin, you can cut off the crescent skin at the incision and keep the perfect nipple and areola. You can press and wrap it for a few days after operation. At present, the breast plastic surgery technology of the best plastic surgery hospital is used to treat breast diseases in men and women, and the effect is good. After breast correction treatment for men and women, many male friends got rid of the problem of too big breasts. In order to ensure the effect of operation, the choice of hospital can not be ignored. Male breast enhancement, male breast development and male breast reduction (Editor: Dong Shan)