Do men have breasts? Of course they do; however, men usually have very little breast development. However, gynecomastia can occur in certain groups of men, such as infants, adolescents and older men, or other triggers such as certain diseases. Gynecomastia usually refers to the painless progressive enlargement of the breasts or the development of tender breast lumps in the subareolar region due to an absolute or relative excess of estrogen in the male body as a result of an imbalance in the ratio of estrogen to androgen. Gynecomastia accounts for about 60%~80% of male breast diseases and is the most common breast disease in men. In recent years, with the improvement of people’s living standards, the incidence of the disease and the demand for treatment, increased significantly . According to the ratio of breast parenchyma to adipose tissue in the breast tissue, it can be classified into the following three types: 1. Breast development in which the breast parenchyma is mainly proliferated; 2. Breast development in which the adipose tissue is mainly proliferated; 3. Breast development in which both the breast parenchyma and the adipose tissue are proliferated. For gynecomastia patients, enlarged breasts affect aesthetics, easily lead to low self-esteem, prevent daily activities, and a very small number of patients have the risk of secondary cancer. Currently, it is believed that if the developed breasts do not disappear after a certain period of time with medication or conservative treatment (usually 1-2 years), surgical treatment is needed. Surgical methods for gynecomastia can be broadly categorized into three types: the first type is sharp excision; the second type is liposuction; and the third type is liposuction with sharp excision;