Sore buttocks and legs may be caused by overwork, sciatica or lumbar spine lesions. 1. Overexertion: If you often do strenuous exercise or do heavy work for a long time, resulting in excessive fatigue of the buttocks and leg muscles, making the local lactic acid secretion is too much, it is easy to appear buttocks and leg pain symptoms. 2. Sciatica: If there is sciatica, the area innervated by the sciatic nerve will usually have pain and other abnormal symptoms, which will be felt in the buttocks and legs. 3. Lumbar spine lesions compressing nerve roots: If there are lumbar spine lesions, such as lumbar spinal stenosis or lumbar intervertebral disc herniation, etc., due to the lumbar spine lesions on the local nerve root compression, it is easy to appear buttocks and legs soreness, and usually there is a numbness phenomenon. Sore buttocks and legs are recommended to actively go to the regular hospital to do the relevant examination, to clarify what causes, if it is caused by disease factors, to actively comply with the doctor’s instructions for treatment.