Buttock with a leg pain clinically is mainly pear-shaped muscle syndrome, lumbar spine diseases such as lumbar spinal stenosis and lumbar disc herniation and other causes. 1. Pear-shaped muscle syndrome: the main manifestation of the buttocks have pressure pain, can be touched to the pear-shaped muscle at the cord-like changes, local muscle hardening, etc., more than a long history of poor posture, generally no back pain performance, leg pain is generally the back of the thigh, through the combination of electromyography and physical examination can be a clear diagnosis. 2. Lumbar spine diseases: common diseases are lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, etc., usually with lumbar back pain and discomfort, accompanied by severe numbness and other manifestations, combined with lumbar spine CT and MRI can be a clear diagnosis. It should be noted that the pain in the buttocks with a leg may also be caused by local aseptic inflammation or muscle pulling injury due to overstrain, and it is recommended to go to the hospital in time for diagnosis and treatment to clarify the condition.