Men can also have breast enlargement, which mainly includes physiological and pathological. Physiological, such as after exercise, it will appear breast enlargement. Pathological causes are mainly seen in: the first is the use of drugs, such as our common antihypertensive drugs is the CCB class nifedipine drugs, can cause breast enlargement; there are other drugs, such as spironolactone it may also cause breast enlargement. Pathology also includes mastocytosis caused by some diseases, such as hyperprolactinemia and hypothyroidism, which can cause mastocytosis in patients, and hypogonadism. In case of mastocytosis, it is recommended that the patient have an ultrasound of the breast, and if there is a problem, further sex hormone tests will be performed to determine whether it is pathological or physiological.