Breast cancer recurrence includes symptoms at the primary site as well as symptoms at other sites. Breast cancer patients who experience recurrence after treatment may have a lump at the breast with hard texture and non-smooth surface, which is not clearly demarcated from the surrounding tissues and cannot be easily pushed. Recurrence involving the suspensory ligament ligament of the breast can lead to localized skin indentation. As the cancer invades the milk ducts, the ducts retract inward, causing the nipple to flatten and dimple. A large mass can give the skin an “orange peel” appearance. Breast cancer that invades the pectoral muscles and fascia can cause the skin to break down, resulting in ulcers, a severe odor, and easy bleeding. Metastasis to the lymph nodes in the armpits may result in enlarged, hard, and pushed lymph nodes, which may fuse with the skin. Metastasis to the lungs can present with chest tightness, shortness of breath, and cough. After the treatment of breast cancer, patients need to go to the doctor for regular checkups, so that they can be treated in time if recurrence of metastasis occurs.