Invasive breast cancer is the most common malignant tumor in women and manifests itself in the form of nodules, lumps, nipple discharge, redness of the skin, and painful symptoms. Early-stage breast cancer is without any discomfort, without any symptoms, but only in the physical examination or self-examination, bathing found a lump on the breast, and then consult the doctor. Early breast cancer lumps are characterized by relatively hard, unclear boundary, non-smooth surface, poor mobility, and there is no pressure pain, and there is also pain in the late stage. The most important symptom of breast cancer is the lump, and when checking the body, one should be alerted to the localized skin elevation, that is, the asymmetry of two mammary glands, and the localized skin elevation on the side with the lump, or there are dimple sign and cellulite-like changes in the skin changes. There is also a kind of nipple discharge, and nipple discharge of breast cancer is characterized by unilateral breast discharge from a single duct, and the discharge of breast cancer is bloody. The diagnosis of breast cancer is found in physical examination. Since there are no obvious symptoms in the early stage of breast cancer, it is very important to pay attention to physical examination and self-examination, and if you find nodules or space occupation in the breast, you should actively go to the hospital for further examination, diagnosis and treatment.