The diagnostic methods for lumbar disc herniation are essentially three-dimensional; that is, clinical symptoms plus physical examination combined with auxiliary examinations. First, let's talk about clinical manifestations, which include pain, functional impairment, and local sensory abnormalities in cases of lumbar disc herniation. Second, in the physical examination of lumbar disc herniation, the intervertebral disc often shows some deformation, and the most common is a reduction or disappearance of the lumbar spine's forward physiological curvature, referred to colloquially as "flatback," where the back appears flat like a board. Other findings may include spinal scoliosis and specific tender points, usually located next to the protruding vertebrae. Percussing these tender points may induce radiating pain to the buttocks or lower limbs. Additional examinations might reveal abnormalities in the strength or sensation of lower limb muscles at different stages, as various muscles and sensory areas are affected differently. Special tests such as the straight leg raise test, femoral nerve stretch test, and neck flexion test are generally positive. The most routine auxiliary examination involves taking x-ray images, followed by CT scans, which can directly visualize the location and extent of the disc herniation. Currently, magnetic resonance imaging (MRI) is also used, which has significant advantages. MRI provides three-dimensional images, showing the sagittal, coronal, and axial planes, which helps in better assessing the condition of herniated discs. Therefore, these are the areas covered in diagnosing lumbar disc herniation.