Breast cancer is a malignant disease that occurs in breast tissue, which needs early detection, early diagnosis and early treatment, and it is easy to find metastasis, and it is easy to have lymph node metastasis and blood line metastasis, which are as follows: 1) Often metastasis to lymph nodes in armpit, with axillary mass, which will have pressure pain, distension and pain, and there will be generalized fever, chills, and leukocytosis.2) Metastasis to supraclavicular region, with mass and pain in that area.3) Right Numbness of the upper limbs, invasion of the nerves in the area leads to sensory impairment.4. Metastasis to all parts of the body through the bloodstream, metastasis to the liver will have pain in the liver area, metastasis to the lungs will have coughing, coughing up phlegm, chest tightness, dyspnea and other symptoms. Metastasis to the vertebrae and cranium will result in neurological symptoms, such as dizziness and headache.5. There will also be systemic symptoms, such as decreased appetite, generalized weakness, and jaundice of the skin.