Young people half of the body numb, consider the following causes: First, if young people appear half of the body numb, while there is dizziness, body numbness is a period of time to get better, get better after reappearing, there is a trend of relapse remission. This is the time to go for magnetic resonance imaging of the head and cervical spine, and also electromyography to understand whether there are demyelinating diseases, such as multiple sclerosis. Second, the young people appear half of the body numbness, to ask the patient how the past sleep, there is no very obvious line of demarcation along the midline of the body, some patients in somatization disorders, it is easy to appear half of the body numbness, there will be obvious midline demarcation. Third, young people with half body numbness, ask the patient whether there is long-term smoking, whether there is a past history of hypertension, some young patients in acute cerebrovascular disease, such as thalamic ridge plug can also be manifested as half body numbness.