Early symptoms of breast cancer often do not have typical signs and symptoms and are not easily noticed, but are often detected through physical examination or breast cancer screening. The following are the typical signs and symptoms of breast cancer. Early stage breast cancer often does not have typical symptoms and signs, so it is not easy to pay attention to it, but often detected through physical examination or breast cancer screening. The following are the typical signs of breast cancer. Nipple overflow: If blood, plasma, milk or pus flows from the nipple during non-pregnancy period, or if milk still flows even after stopping breastfeeding for more than half a year, it is called nipple overflow. There are many causes of nipple overflow, and common diseases include intraductal papilloma, breast hyperplasia, ductal dilatation of the breast and breast cancer. Unilateral single hole of bloody overflow should be further examined, and more attention should be paid if accompanied by breast lumps. 2. Pain: Although some patients with early stage breast cancer are not yet able to touch a definite lump in the breast, they often have local discomfort, especially postmenopausal women, who sometimes feel mild pain and discomfort in one breast, or sinking and soreness in the back of one shoulder, even involving the upper arm of that side. The vast majority of patients do not feel any obvious pain, but a few patients go to the doctor with pain, which is mostly paroxysmal stabbing pain or vague pain. The pain is mostly paroxysmal stabbing pain and vague pain. The pain is not serious in the late stage. Breast lumps: 80% of breast cancer patients are first diagnosed with breast lumps. Breast lumps are often found unintentionally, most of them are single, hard, with irregular edges and less smooth surface. Most breast cancers are painless lumps, only a few are accompanied by varying degrees of hidden pain or stabbing pain. The most common one is that the tumor invades the Cooper’s ligament which connects the breast skin and the deep pectoral muscle fascia, causing it to shorten and lose its elasticity, pulling the skin of the corresponding area, resulting in the “dimple sign”, i.e. a small dimple in the breast skin, like a small dimple. If the cancer cells block the lymphatic ducts, “orange peel-like changes” will appear, i.e. the skin of the breast will have many small dips, just like an orange peel. In advanced stage of breast cancer, the cancer cells infiltrate into the skin along the lymphatic ducts, glandular ducts or fibrous tissues and grow into the skin, forming scattered hard nodules around the main cancer site, which is called “skin satellite nodules”. 5.Abnormal nipple and areola: if the tumor is located in or close to the deep nipple, it may cause nipple retraction. If the tumor is far away from the nipple and the large duct in the breast is invaded and shortened, it may also cause nipple retraction or elevation. Eczema-like carcinoma of the nipple, i.e. Paget’s disease of the breast, manifests as itching, erosion, rupture, crusting, flaking and burning pain of the nipple skin, resulting in nipple retraction. 7.Changes in the appearance of the breast: the skin at the lump is seen to be elevated, and some local skin is orange peel-like, or even edema, discoloration, eczema-like changes, etc. 8, axillary lymph node enlargement: when the axillary lymph nodes are large, you can feel a sense of object squeezing in the armpit, or feel a swelling protruding from the armpit when you raise your arm. 9. Asymmetry of both breasts: When the mass increases in size or adheres to the chest wall, the affected breast will be different from the opposite side in size, shape, etc. 10. Inflammatory: Breast cancer manifests with significantly enlarged breasts, red and swollen skin and faster progress, which is a unique manifestation of inflammatory breast pain, sometimes easily misdiagnosed as mastitis, breast abscess and ineffective anti-inflammatory treatment. Male breast cancer symptoms are uncommon, and the incidence rate accounts for 1% of breast cancer incidence and 0.1% of malignant tumors in men, and the age of onset is on average 6-11 years higher than that of female breast cancer. The symptoms of male breast cancer are mainly painless lumps under the areola, 20% of patients have nipple invagination, crusting and drainage, the boundary of the lump is often unclear, there are often early skin or pectoral muscle adhesions, and the rate of axillary lymph node metastasis is higher. The pathological manifestations of male breast cancer are similar to those of female breast cancer, most of them are invasive ductal carcinoma. The treatment of male breast cancer is the same as that of female breast cancer, but since male cases have smaller breast tissue and are prone to early invasion of the pectoral muscle, radical surgery or extended radical surgery should be the main surgical approach.