Male breast cancer is often located in the nipple area of the breast, under the areola, and most often manifests itself as painless breast lumps, which are relatively hard in texture and have poor mobility. When checking the breast, the examination is usually done according to five regions, starting from the outer upper, outer lower, inner lower, inner upper, touching the nipple in turn, and finally checking the armpit area to find out about the lymph nodes. If men have hard lumps in the nipple area and under the areola, they need to pay clinical attention, mostly painless lumps, a few patients with different degrees of hidden pain and poor mobility, they can do molybdenum target of the breast, breast ultrasound combined with local tissue biopsy to exclude the possibility of breast cancer. The incidence of male breast cancer is lower than that of female breast cancer, and radical surgery can be done in early stage.