Painful symptoms on the back of the thigh are commonly caused by muscle strains, sciatic neuropathy, local fractures, etc., as follows: First, muscle strains: strains in the muscles on the back of the thigh, such as the biceps femoris and hamstrings. In the process of sports, especially jumping movements, the posterior thigh group muscle injury is prone to occur. Patients will have pain symptoms in the back of the thigh, accompanied by swelling, as well as limited movement of the hip and knee joint. Second, sciatic neuropathy: such as sciatic nerve inflammation or sciatic nerve compression, can lead to pain symptoms in the posterior aspect of the thigh innervated by the sciatic nerve, usually hyperalgesia or knife-like pain. Third, local fracture: such as a fracture of the femur, will cause local pain symptoms, fracture reset and fixed pain symptoms will be alleviated, through active rehabilitation training, can make the fracture heal quickly, pain symptoms will also gradually disappear.