The numbness of half of the patient’s body may be caused by cerebrovascular disease, or it may be caused by brain tumor or cervical or lumbar spine disease, which should be clarified by combining the patient’s onset triggers and relevant examinations. If cerebrovascular disease causes half of the body numbness is mostly sudden onset, will reach the peak in a short period of time, see the brain hemorrhage, cerebral infarction of the disease, need to immediately visit the hospital for treatment. If the symptoms of numbness gradually appear, persist, progress and worsen, it may be caused by brain tumor or brain occupancy. Patients may also have headache, nausea, vomiting and other symptoms of cranial hypertension. Numbness in half of the patient’s body may also be caused by cervical or lumbar spine diseases, such as herniated intervertebral discs that compress the nerve roots, resulting in numbness.