The patient’s thighs and buttocks are sore, and the following causes should be considered when this occurs: 1. lumbar disc herniation: when the herniated disc tissue compresses the spinal nerve roots, there will be radiating pain in the lower limbs, and the pain can radiate from the lower back to the buttocks, then to the back of the thighs, calves, and all the way to the feet, sometimes accompanied by numbness in the feet and decreased muscle strength in the lower limbs. 2. pyriform muscle syndrome: mainly The main reason is that the abnormal muscle fibers at the outlet of the pear-shaped muscle compress the sciatic nerve and cause symptoms of sciatic nerve compression, manifesting as soreness and discomfort in the back of the thigh and buttocks. 3, gluteal myofasciitis: gluteal myofasciitis is mainly due to excessive ambulation, which causes aseptic inflammation of the gluteal fascia, mainly manifesting as lateral and posterior thigh, as well as bilateral symmetrical pain in the buttocks.