Lumbar disc herniation leads to cold lower limbs, mostly due to sensory impairment caused by nerve compression, which is more serious. Lumbar disc herniation is due to long-term weight-bearing activities, advanced age and other factors, causing degenerative changes in the lumbar spine, resulting in lumbar disc degeneration nucleus pulposus protruding backward, which can compress the back of the spinal cord and the nerve root to cause the corresponding symptoms, such as lumbar pain, leg pain, numbness, sensory abnormalities. Coldness in the lower limbs in lumbar disc herniation is mostly caused by the herniated nucleus pulposus compressing the nerve roots and nerve damage leading to sensory impairment. This situation indicates that the disease is relatively serious and requires active and standardized treatment. Conservative treatment can be started with the use of nutritive nerve medication, such as methylcobalamin, etc., which can also be combined with physiotherapy, such as intermediate-frequency electrical impulses, to enhance the efficacy of the treatment. If conservative treatment is ineffective and symptoms are severe, surgery can be considered to remove the herniated nucleus pulposus and relieve nerve root compression. When symptoms such as cold lower limbs caused by lumbar disc herniation occur, it is recommended to go to the hospital in time to improve the relevant examinations, and then follow the doctor’s instructions to carry out standardized treatment after a clear diagnosis, and do not blindly use medication on your own, so as to avoid delaying the condition.