Hi, Numbness in the leg while walking could be caused by a variety of conditions. Some possible causes of numbness in the leg while walking include: * Peripheral neuropathy: This is a condition that affects the nerves outside of the brain and spinal cord. It can cause numbness, tingling, and pain in the affected area, and can be caused by a variety of factors such as diabetes, vitamin deficiencies, and nerve damage. * Lumbar spinal stenosis: This is a narrowing of the spinal canal in the lower back, which can put pressure on the nerves that travel through the spine. It can cause numbness, tingling, and weakness in the legs, and can be caused by degenerative changes in the spine, herniated discs, or tumors. * Sciatica: This is a condition where the sciatic nerve, which runs from the lower back down to the legs, is compressed or irritated. It can cause numbness, tingling, and pain in the legs, and is often caused by a herniated disc or spinal stenosis. * Peripheral artery disease: This is a condition where the arteries in the legs become narrowed or blocked, which can cause numbness, tingling, and pain in the legs when walking. This is often called claudication and is due to the reduced blood flow to the muscles of the leg. * Vitamin deficiencies: Certain vitamin deficiencies, such as B12 deficiency, can cause numbness and tingling in the legs. Treatment options for numbness in the leg will depend on the underlying cause. Treatment may involve medications, physical therapy, lifestyle changes, or surgery in some cases. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician