Clinical symptoms of numbness in the left toe are common for the following reasons: First, lumbar disc herniation. A lumbar disc herniation compresses the nerve and causes edema in the nerve, which will inevitably cause numbness in the left toe and will be accompanied by weakness in toe movement. The patient’s lumbar symptoms are also very obvious, such as pain and restricted movement. Taking an MRI can reveal the segment of the herniated lumbar disc and the degree of nerve compression. Second, trauma to the left foot, sprain or smash of the toe, local swelling will be more obvious, swelling will compress the nerve, so that the toe nerve conduction dysfunction, will also cause the clinical manifestation of numbness, taking X-ray film will sometimes find the presence of fracture. Third, severe cervical spinal stenosis can cause sensory conduction dysfunction of the lower extremities and weakness of the lower extremities, and numbness of the toes can also occur.