The symptoms of edema in the nerve roots of the lumbar spine mainly include three aspects: First, radiating pain in one lower limb is mainly due to the irritation of the lumbar spine to the nerve roots of the lumbar region, resulting in the inflammatory edema of the nerve roots, which affects the normal nerve function and causes the symptoms of radiating pain in the lower limbs. Second, numbness in the lower limbs is due to more serious edema and longer time, which gradually leads to nerve ischemia in the process of long-term pressure on the nerve roots, and numbness will be formed at the distal end. Third, there is obvious pain in the lumbar spine area. When edema occurs in the nerve root, due to the intervertebral disc or bony stenosis, the compression stimulation of the nerve root, the edema of the nerve root, the surrounding tissue structure is also prone to edema, and the inflammatory metabolites stimulate the peripheral nerves, and the symptoms of lumbar pain will also appear.