The pain of the sacrum is treated differently according to the cause, and the main causes are considered the following three points: 1, ankylosing spondylitis, which is due to immune system diseases, resulting in pain at the sacroiliac joint, which can be reduced after activity and significantly aggravated after rest. In the treatment can be oral non-steroidal anti-inflammatory drugs, such as meloxicam symptomatic treatment, but at present there is no complete cure. 2, trauma caused by the sacrococcygeal fracture, fracture without displacement, through rest to reduce activity with non-steroidal anti-inflammatory drugs, with the extension of time will gradually ease; and for fracture displacement is obvious recommended to perform surgery to restore the continuity of the bone. 3, sacral tumor It is relatively rare clinically, but the occurrence of pain is generally considered to be malignant, and X-ray examination is needed to clarify the diagnosis, and the treatment requires surgical removal and further radiotherapy and chemotherapy.