There are usually two cases of large male chest, one is the high body fat content, too much fat caused by the accumulation of some fat in the chest, and another is the abnormal secretion of estrogen in the male body resulting in abnormal breast development. According to the different reasons for large male chest, the common ways to slim down are as follows: 1, obesity: because of obesity caused by the accumulation of chest fat should be active exercise, and adjust the diet structure, through weight loss to reduce the body fat content, so that the male chest shrink; 2, hormone secretion disorders: men in the process of growth and development may have excessive secretion of estrogen, resulting in an imbalance in the ratio of estrogen and male hormones thus leading to breast enlargement This is a good way to increase the size of the breasts, which occurs in adolescence and old age. In addition, if you eat too much hormone-fed animal meat, it may also lead to an imbalance in the ratio of estrogen to androgen in the body, resulting in breast enlargement. Treatment is usually done with estrogen antagonists or androgen injections to adjust hormone levels in the body to achieve a balanced state. If breast development affects the beauty, surgery can be used to correct the size of the breast; 3. Other: If the enlarged breast has pressure pain or only unilateral breast enlargement, it may be breast enlargement, breast cancer and other diseases, you should go to the hospital in time to identify the cause for treatment.