The first thing you need to check is whether there is trauma to the buttocks and legs at the same time, trauma causes damage to both buttocks and legs generally often manifests as pain in the buttocks and legs. In the absence of trauma, if pain in the buttocks and legs occurs, it is often considered to be caused by problems with the nerves or muscles that govern the buttocks and legs, mainly due to the following conditions: 1. lactic acid accumulation: patients who do not exercise for a long time suddenly perform a lot of exercise, which can easily lead to the accumulation of lactic acid in the buttocks and legs and other muscle-rich locations and may cause muscle pain in the buttocks and legs; 2. lumbar disc herniation: if Patients appear buttocks and legs of radioactive pain, numbness and other symptoms, in the squatting or sitting position, the pain symptoms reduced, usually considered to be caused by lumbar disc herniation caused by sciatic nerve compression, and general lumbar shoulder disc herniation patients will also be accompanied by symptoms of lumbar discomfort; 3, pear-shaped muscle syndrome: if patients have buttock pain, and pain along the back of the thigh to calf and foot radiation, may also be pear-shaped muscle The pain level usually increases when sitting, and can be distinguished from lumbar disc herniation; 4. In addition, various other diseases in the lumbosacral region, such as femoral head necrosis, sciatic neuritis, sacroiliac arthritis and other diseases, may involve the buttocks and legs and cause painful symptoms.