The treatment of numbness of the left foot is different according to different causes. Specific methods are as follows: 1, stroke: may cause numbness of the limbs, perfect CT examination, clear whether there is ischemic lesions, using anti-platelet aggregation, lipid regulating drugs, symptomatic treatment; 2, neuritis: usually for the distal extremity numbness, take nutritional nerve treatment, such as oral vitamin B12, B1, serious cases take surgery; 3, lumbar intervertebral disc herniation: numbness with pain, usually along the sciatic nerve course, need to perfect lumbar CT or MRI, clear diagnosis, take physiotherapy methods to relieve. 3, lumbar disc herniation: numbness with pain, usually along the sciatic nerve, need to improve the lumbar spine CT or magnetic resonance, a clear diagnosis, to take physical therapy methods to relieve.