Sitting buttock pain may be caused by physiological reasons such as sitting for too long, seat too hard, or it may be caused by pathological factors such as lumbar disc herniation and pyriformis muscle injury. 1. Physiological reasons: there are soft tissue structures in the buttocks such as gluteus maximus and gluteus minimus, which are responsible for cushioning the pressure when the body is in the sitting position. If the sitting time is too long or the seat is too hard, it may lead to the local soft tissues being under pressure for a long period of time, which may cause the local blood circulation to slow down, and then there is accumulation of metabolites, which may stimulate the peripheral nerve roots and cause the symptom of pain in the buttocks. 2. Pathological factors: degenerative lesions of the lumbar spine can lead to the occurrence of lumbar disc herniation, lumbar disc herniation can cause narrowing of the vertebral body space, nerve compression and other pathologic changes, due to the increase in vertebral body pressure when sitting, which may lead to buttock pain; various reasons for the pyriformis muscle injury, which can cause the sciatic nerve compression, and the above symptoms may also occur. The symptoms of sitting buttock pain alone sometimes can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of the doctor, and standardized treatment.