The following are common causes of plantar numbness: 1, neuropathy: such as lower limb sciatic nerve compression, sciatic nerve can be compressed in the pear-shaped muscle area, resulting in nerve conduction dysfunction, the patient has plantar numbness clinical symptoms, severe cases will appear lower limb claudication, electromyography can detect the lesion of the sciatic nerve. 2, lumbar disc herniation: stimulation of the nerve root, can cause the symptoms of plantar numbness on one side. 3, diabetes: long-term failure to control blood sugar in a timely manner, prone to plantar nerve lesions, resulting in neurotrophy, resulting in plantar numbness clinical symptoms. Patients usually poor blood sugar control, through timely diagnosis, timely treatment, can make the plantar numbness symptoms quickly alleviated.