The bone in the middle of the buttocks is called sacrococcygeal, and there are two main reasons for its pain: 1. The common one is the pain caused by sacrococcygeal bursitis, which is mainly due to trauma or repeated frictional damage to the sacrococcygeal bone, forming inflammation of the bursa of the sacrococcygeal bone, and the patient will have pain in the middle of the buttocks as soon as he sits, which is very painful. Treatment can be physical therapy and hot compresses for the middle of the buttocks, and do not sit in a sitting position, especially on a hard bench. If you have to sit, you can make an inflatable sitting gasket and put it under your buttocks, so that the middle of your buttocks can be suspended when you sit to avoid pressure, and you can also take oral and topical anti-inflammatory painkillers to reduce the pain.2. Another reason is the fracture caused by the sacrococcygeal bone, which has a relatively long treatment period, but generally there is no need for special treatment, just rest in the prone position, carry out pain relief and symptomatic treatment, avoid sitting, and let it recover slowly. Let it recover slowly.