Numbness and numbness of legs and feet may be related to physiological factors, and may also be caused by spinal lesions, diabetic peripheral neuropathy, cerebrovascular lesions and other factors. 1. Physiological factors: for example, if you keep a posture for too long, the blood flow in the lower limbs will be impaired, which will lead to physiological numbness of the legs and feet, and it can be improved by yourself after reasonable activities. 2. Spinal lesions: cervical spondylosis, thoracic spine and lumbar spinal stenosis may cause serious compression and damage to the nerves that innervate the lower limbs, which will cause numbness of the feet and legs, accompanied by lumbago, lower limbs and other symptoms of radiating pain. 3. Diabetic peripheral neuropathy: diabetic patients do not use reasonable medication, blood sugar continues to increase, may induce peripheral neuropathy, will cause numbness of the feet and legs, may also be accompanied by pain, sensory loss and other symptoms. 4. Cerebrovascular lesions: for example, lacunar cerebral infarction, acute cerebral infarction, acute cerebral hemorrhage, etc., can lead to central nervous system damage, which will cause numbness of legs and feet, and may be accompanied by numbness of the upper limbs, headache, nausea and vomiting and other symptoms. If the numbness of legs and feet lasts for a long time or is accompanied by other obvious discomforts, you should consult a doctor for examination and treatment in time to avoid delaying your condition.