Men can get breast cancer. Theoretically, the incidence of breast cancer in men is usually within 1% of that in women, and the principle of its development is the same as that in women, because men also have a small number of glands under the nipple and areola, about the size of a soybean, so their incidence is low compared to that of women. The more recognized causes of male breast cancer are the increase of estrogen level in the body, food consumption, abnormal liver function or exogenous estrogen causing glandular stimulation, and partly due to genetic factors, but usually the cause cannot be identified if the test is performed, which means the cause is unknown. The treatment of male breast cancer is the same as that of female breast cancer. If breast cancer is suspected, pathological examination is required and surgery is performed after the diagnosis is confirmed. The recovery is also better with regular checkups and less damage to the body, which is usually the local morphological changes and the ability to live, including work.