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, hypothyroidism can cause mastocytosis in patients; there are also some hypogonadism, if there is mastocytosis, patients are advised to have an ultrasound of the breast, and if there is a problem, further sex hormone examination to determine whether it is pathological or physiological.