If a patient has pain in the thigh when lifting the leg, it may be a symptom caused by lumbar disc herniation, mainly due to lumbar 3 lumbar 4 disc herniation which causes pain in the thigh, called straight leg elevation test, and the severity of the patient’s condition needs to be judged according to the elevation height of the straight leg elevation test. In general, the limb elevation test should be negative above 80 degrees, which is a normal phenomenon. If it is below 80 degrees, it means that the straight leg elevation is positive, and the lower the elevation angle is, the more serious the patient’s condition is. The diagnosis of lumbar disc herniation can be clarified. After this diagnosis is made clear, if the patient’s pain is severe, surgery is recommended for timely treatment.