Pelvic pain 3 months after prostate cancer surgery is considered to be caused by postoperative wound infection or bone metastasis of cancer cells, patients need to pay attention to it and report to the doctor in time. Prostate cancer is a kind of tumor caused by malignant proliferation of prostate epithelial cells, and its etiology is not yet clear, which may be caused by heredity, gene mutation, improper diet, obesity and other factors. Early prostate cancer is not obvious to patients. When prostate cancer develops to advanced stage, patients may have pain in the pelvis, lower back and other parts of the body, swelling of lower limbs, weakness, numbness and other symptoms. If patients with prostate cancer still have pelvic pain 3 months after surgery, it can be considered to be caused by local infection after surgery. Or it can be considered that the cancer cells have spread and metastasized to bones or other organs after the failure of surgical treatment, resulting in pelvic pain.