Breast cancer is one of the most common malignant tumors in women. Early stage breast cancer often has no typical symptoms and signs, and is often detected during physical examinations; typical symptoms and signs are mostly seen in middle and late stage breast cancer. The following is a brief introduction of the typical clinical manifestations of breast cancer. Breast lumps Most breast cancer patients are first diagnosed with breast lumps, which are often found unintentionally, mostly single, painless and hard. Nipple and areola abnormalities are mostly nipple invagination or nipple eczema-like manifestations such as itching and erosion of nipple skin. 3, nipple overflow manifested as blood, pus, plasma, etc. from the nipple. 4. Skin changes: orange peel-like changes in the breast or small nodules in the breast skin. 5.Lymph nodes in the axilla are enlarged. The lymph nodes are hard and active in the early stage, and gradually fixed and fused as the disease progresses. If you have the above mentioned manifestations, you should go to the hospital as soon as possible.