For diseases that cause tongue numbness and hand numbness, the details are as follows: First, demyelinating diseases: If a young patient suddenly develops tongue and hand numbness, ask the patient if there is dizziness, lightheadedness, weakness in the hands and feet, and need to undergo cranial and cervical spine MRI to find out if there are demyelinating diseases, such as multiple sclerosis. Second, acute cerebrovascular disease: If the patient is elderly and has a past history of hypertension, diabetes, long-term alcohol consumption, etc., head MRI and CT examinations should be performed to find out whether there is acute cerebrovascular disease, such as cerebral infarction and cerebral hemorrhage. Third, somatization disorders: If the patient is young and the numbness is intermittent, accompanied by panic, chest tightness, sweating, poor sleep, etc., also consider the possible existence of somatization disorders.