Breast cancer usually requires surgical resection treatment to improve patients’ prognosis. The reasons for pain after surgical treatment may be surgical injury, tumor metastasis, cancer cell proliferation, inflammation stimulation, etc. 1. Surgical injury: The operation process of breast cancer surgery may lead to tissue trauma and nerve damage, resulting in pain in the surgical area after surgery, which can be relieved by taking some non-steroidal painkillers orally as prescribed by the doctor. 2.Tumor metastasis: If there is pain in other parts, such as joint pain or bone pain, it may be caused by tumor metastasis. It needs further improvement of bone scan examination and symptomatic treatment at the same time; 3. Cancer cell proliferation: If the phenomenon of breast swelling and pain occurs, there may be cancer cell proliferation, and it needs to go to hospital for examination as soon as possible; 4. Inflammation stimulation: Inadequate postoperative care, inflammation occurs, and inflammation stimulation causes lymph node redness, swelling and pain, resulting in symptoms of axillary pain, and some antibiotics can be taken to control inflammation. Therefore, if there is pain after surgery, you need to find the cause in time and actively treat it. Daily keep a good state of mind, adjust the tension, diet can eat some food rich in dietary fiber, which is conducive to the prevention of constipation.