Men have mammary glands, just like women, and they include nipples and areolas. The difference is that men do not have mammary glands, and the male mammary gland is in a state of underdevelopment. The male breast can develop if there are physiological disorders, such as the following: i. Men can develop breast development and breast enlargement when androgens are reduced. Second, the elderly will also appear like mammary gland development. Third, obese patients, because the fat content in the body of this group is higher, resulting in the development of breast glands, but not as large as women’s. Fourth, pathological development, such as endocrine disorders inside the body will appear breast development, manifested unilaterally or bilaterally, pathological development requires surgical treatment. Men also have mammary glands and need to be treated if there is abnormal breast development.