Gynecomastia is the abnormal enlargement of the male breast. Although the growth in the breast tissue is rare before puberty, it most often occurs after puberty. Examination and, if necessary, radiological examination are performed in patients with breast enlargement. The causes of gynecomastia are varied. Hormone imbalances are the most common cause. Hormone intake, tumors of endocrine origin, testicular development disorders are other causes of gynecomastia. During puberty, 60-70% mammary gland enlargement occurs in males, but this is not very noticeable. It disappears within 6 to 18 months and the breast returns to its normal size. 40% of adult men have gynecomastia changes, this growth may be unilateral or bilateral. As a surgical treatment method, liposuction and removal of the mammary gland are the most suitable techniques. These treatment methods vary according to the findings from the breast examination. Good results are obtained with the liposuction method in patients with a large amount of adipose tissue in the breast. In patients with excess adipose tissue and excess mammary gland, breast tissue should be removed with liposuction. If there is excess skin in addition to excess fat and breast tissue, the skin is removed together with the fat and breast tissue. Dressing is applied for 3 weeks after the operation and the patient is called for monthly control.