The cause of gynecomastia is generally considered to be due to an imbalance between estrogen and androgen in the body. Various causes of this imbalance can lead to gynecomastia. Early treatment of gynecomastia, whether physiologic or pathologic, idiopathic or pharmacologic, is generally conservative for the cause. However, if the developed breast does not shrink after 1 year of medical observation or medication, the patient is prone to low self-esteem and is reluctant to participate in public activities such as swimming. Some boys are reluctant to lift their chests and hunch their backs all day long, which may cause anxiety disorders and other psychological disorders in serious cases. Therefore, surgical treatment is considered from both psychological and cosmetic perspectives. In addition, some patients and their families are afraid of breast cancer, their family members have a history of breast cancer, and the doctor, after examination, highly suspect the possibility of breast cancer or cannot exclude the possibility of breast cancer, especially when unilateral breast development, skin changes with pain and other discomfort, can be treated surgically. Today’s plastic surgery methods for gynecomastia can be broadly divided into three categories: the first is the sharp excision method, the second is the liposuction method, and the third is the liposuction plus sharp excision method. The three types of surgical methods have their own advantages and disadvantages. The sharp excision method is easy and intuitive, and the removal of breast hypertrophy tissue is complete, and the surgical results are reliable, but the disadvantage is that there is a lot of bleeding and the sensory nerve of the breast may be damaged. The liposuction method is simple, with less bleeding and less damage to the sensory nerves of the breast, but the results are unreliable and the enlarged breast tissue is often not completely suctioned out. Liposuction plus sharp excision method, although absorbing the advantages of sharp excision method and liposuction method, natural appearance, reduce the complications, but the operation is more complicated. The choice of surgical method depends on the specific situation of the patient. The stitches are removed about 10 days after surgery and a tight-fitting garment is worn for at least one month. This allows for a more natural appearance.