Pre-breast cancer symptoms include: 1. Breast lump: 80% of breast cancer patients have breast lump as the first symptom, which is mainly lobulated, with unclear boundary, hard texture and painless and rapid growth, with higher possibility of malignant transformation. If the breast lump is more than 1cm in color ultrasound examination, early surgery is recommended. 2. nipple overflow: tumor usually grows near the nipple or in the milk duct, nipple overflow is the first symptom, including blood, pus, plasma, and milk, so you need to go to the hospital for ultrasound examination early to observe whether there is tumor growth in the nipple. 3. skin-like changes: some deep breast tumors can invade some ligaments in the breast in early stage. It is called cooper’s ligament, which causes restricted skin depression performance, called dimple sign.