Currently, the incidence of breast cancer is about 35/100,000, and it is increasing year by year. Breast cancer has replaced lung cancer as the number one cancer, and 99% of the patients are women, which means that men account for about 1% of the patients. Although the incidence of breast cancer is much lower in men than in women, it is not necessarily impossible to get breast cancer. When men have breast development, breast lumps, nipple overflow, etc., they need to pay special attention and seek medical attention in time to improve relevant auxiliary examinations under the guidance of professional doctors so that problems can be detected, diagnosed and treated early, so they cannot be taken lightly and may also get breast cancer.