The physical examination of lumbar disc herniation is mainly based on the patient’s complaint, whether it is mainly lumbar pain or leg pain, generally the lumbar 4, 5 and lumbar 5 sacral 1 disc herniation, accounting for more than 90%, the incidence of other stages is relatively low. First of all, let the patient take the prone position, the midpoint of the line connecting the highest points of the two iliac crests is the muscle gap of lumbar 4 and 5, the pressure pain in the muscle gap or paramuscular indicates that there is a problem in this stage of the disc, the next one is the lumbar 5 sacral 1 muscle gap and paramuscular. At the same time, it is important to see if there is atrophy of the gluteal muscle. If one side of the hip is flatter, it means that there is atrophy of the gluteal muscle, which is also a typical symptom of a herniated disc. After prone position, let the patient take supine position and straighten and lift the leg, called straight leg elevation test, which can reach more than 80-90° when normal. When the patient has pain at 20-30° or 50-60°, it is called positive straight leg elevation test, which is also a typical manifestation of lumbar disc herniation.