Leg numbness, foot numbness may only be due to prolonged sitting, squatting or stretched legs and other causes of lower limb blood flow disorders, nerve compression, the occasional occurrence of leg numbness, foot numbness symptoms, generally do not need to worry too much. However, if the symptoms of leg and foot numbness persist or recur, it may be related to lumbar lesions, sciatic neuropathy, cerebrovascular lesions and other disease causes. 1, lumbar lesions: lumbar disc herniation, lumbar spinal osteophytes, lumbar spinal stenosis, lumbar spinal canal tumors and other lumbar diseases, may cause the lower extremity of the sciatic nerve root compression, so there may be leg numbness, foot numbness, accompanied by lumbar pain, leg muscle 2, sciatic neuropathy: sacroiliac arthritis, pear-shaped muscle syndrome, trauma and other diseases, resulting in sciatic nerve injury or inflammatory response, usually also induce leg numbness, foot numbness, when bending or lumbar weight, there are symptoms of increased performance; 3, cerebrovascular lesions: cerebral hemorrhage, cerebral infarction, cerebral hemangioma and other cerebrovascular lesions, will also lead to the persistence of leg numbness, foot numbness symptoms. Most patients will also experience nausea and vomiting, blurred vision and other symptoms in the early stage of the lesion; 4, other: spinal cord tumors, spinal cord cavitation, spinal cord cervical spondylosis, late complications of diabetes mellitus peripheral neuropathy and other diseases can also lead to the occurrence of leg and foot numbness symptoms. Due to the relatively complex etiology, it is recommended that patients with persistent or recurrent leg numbness and foot numbness should seek timely medical attention, undergo X-ray and CT examinations, and be diagnosed by a professional doctor based on the examination results and the patient’s overall condition, and be given a corresponding treatment plan.