Heel numbness, knee weakness consider lumbar disc herniation or lumbar spinal stenosis, for the cause of the drug treatment, physical therapy or surgical treatment. 1. Lumbar disc herniation: bed rest, lumbar traction can be performed to reduce the pressure on the lumbar intervertebral discs, so that the nerve pressure can be reduced, oral nutritional nerve drugs, such as methylcobalamin dispersible tablets. It can also be treated with neuromuscular electrical stimulation and lumbar disc removal surgery if conservative treatment is not effective. 2. Lumbar spinal stenosis: avoid sitting for a long time or doing tiring work, exercise the lumbar back muscles, such as plate support to increase the stability of the lumbar spine, acupuncture or low-frequency pulsed electro-physiotherapy, oral non-steroidal painkillers, such as diclofenac sodium enteric-coated tablets. If conservative treatment is ineffective, laminectomy can be performed to decompress the nerves. Heel numbness and knee weakness require further treatment. The use of medication should be in accordance with the doctor’s instructions.