In patients with painful posterior thigh stretching, it may be that the sciatic nerve is stimulated and stretched during posterior thigh stretching, causing the patient to experience pain, accompanied by decreased skin sensation and decreased muscle strength on the posterior thigh. If a patient has an injury to the quadriceps or biceps muscle group, stretching on the posterior thigh can pull and stimulate the injured muscle tissue, causing the patient to experience pain. If the patient suffers from fasciitis, bursitis or contracture of the iliotibial bundle in the thigh area, stretching the thigh can stimulate the local lesion and cause the patient pain. So the patient should stop stretching after this condition, should rest in bed, and at the same time give hot compress treatment in the painful area, physiotherapy instrument baking electricity, can make the pain relief.