Numbness of hands and tongue may be caused by peripheral neuritis, ischemic cerebrovascular disease and other diseases. 1. Peripheral neuritis: caused by the sensory nerve endings fiber lesions, can cause numbness of hands and feet, can also be accompanied by tongue numbness. 2. Ischemic cerebrovascular disease: transient ischemic attack, ischemic stroke, mainly due to cerebral vascular embolism, cerebral atherosclerosis, hemodynamic changes in cerebral vascular occlusion, coagulation disorders, etc., resulting in insufficient blood supply to the brain, resulting in neurological function is impaired, the symptoms of numbness of the hands and tongue will occur. If the numbness of the hands and tongue is often unrelieved, you should go to the hospital in time to find out the cause of the disease and treat the cause.