Breast cancer patients may have the following symptoms: 1) vague pain or no symptoms, most breast cancer patients find lumps when they touch their breasts; 2) as the lumps increase in size, patients may feel breast swelling and pain, and orange peel signs and nodules appear on the breast surface; 3) breast secretion of bloody secretion, eczema-like skin changes, redness, swelling, heat and pain when there is infection; 4) enlarged lymph nodes in the axilla, neck and clavicle area; 5) symptoms of organ metastasis: bone pain when there is bone metastasis, dizziness and changes in limb function when there is brain metastasis, etc.