Nerve pain in the left leg should be treated with general therapy, medication, physical therapy and surgery according to the cause, which may be related to spinal disease, intracranial space occupation, viral infection and other causes. 1. Spinal diseases: such as lumbar disc herniation, lumbar spinal stenosis, etc., leading to nerve root compression of the lower limb causing radiating pain and numbness in the lower limb, oral non-steroidal anti-inflammatory drugs such as ibuprofen and other nutritive drugs such as methylcobalamin, and also lumbar spine traction, massage and other physical therapies under the guidance of professionals. For those who are ineffective in conservative treatment, surgical decompression treatment is feasible. 2. Intracranial space occupation: if caused by intracranial tumor, dehydrate such as mannitol can be applied to lower the cranial pressure, and non-steroidal anti-inflammatory drugs such as ibuprofen can be used to relieve the pain; according to the specific situation, appropriate surgical treatment should be chosen in time. 3. Viral infection: If the left leg neuralgia is caused by herpes zoster virus infection, oral antiviral drugs such as acyclovir, analgesics such as ibuprofen and glucocorticosteroids such as prednisolone can be taken. There are other causes of nerve pain in the left leg, if it continues to be unrelieved, you should go to the regular hospital in time, improve the examination to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor. The medication should be applied according to the doctor’s prescription.