Lumbar disc 1 and 5 herniation leg pain is mostly due to the nucleus pulposus of lumbar intervertebral disc protruding on the nerve root mechanical compression or local inflammatory substances stimulate the nerve root, resulting in radiating pain in the leg. 1. Mechanical compression: lumbar intervertebral disc 1 and 5 herniation refers to the degeneration of the lumbar spine, the nucleus pulposus of the lumbar intervertebral disc breaks through the annulus fibrosus in the backward direction, compressing the nerve root, and the pain goes down along the innervation area of the nerve root, and the patient may have leg pain, numbness, limited activity and other symptoms. 2. Inflammatory substance stimulation: due to the nucleus pulposus protruding backward to stimulate the nerve root, causing edema and inflammation of the nerve root, patients may also experience leg pain, numbness, limited movement and other symptoms. Lumbar disc 1 and 5 herniated leg pain is recommended to go to the hospital in a timely manner, early formal treatment, in order to reduce the adverse effects of the disease.