Breast cancer is one of the most common malignant tumors in women, and very few men may also have breast cancer.1. Mainly through clinical physical examination, breast cancer may not have obvious symptoms, mainly manifested as painless breast lumps, which can be touched on the breast, and may be more obvious to men, and may be touched only by women who need professional physical examination and may be found inadvertently when taking a shower. 2. 2, do breast ultrasound or molybdenum target examination, can be found occupying lesions. 3, once found ultrasound or molybdenum target grading is higher, such as in grade 4 or above, suggesting that there is a possibility of breast cancer, need to consider doing puncture cytology or further surgery to remove the lump, do pathology to be able to confirm the diagnosis of breast cancer is only through the pathology of the examination of the gold standard for the confirmation of the diagnosis.