Gynecomastia is the enlargement of the mammary gland in men. The excess of the mammary gland can occur due to hormonal imbalance, obesity, use of some medications, among other causes. Gynecomastia is not a serious problem and is curable. Some cases in adolescence may disappear spontaneously. Many cases need surgery to remove the excess mammary gland and promote a naturally masculine chest region. Gynecomastia can cause self-esteem problems in men, because the excess mammary gland causes a female breast shape and, many times, this situation is worsened with the accumulation of fat in the chest region, which we call lipomastia.