Numbness of half of the face and one hand is usually considered to be caused by stroke or intracranial space-occupying lesions. 1. Cerebral stroke includes cerebral infarction and cerebral hemorrhage. Cerebral infarction or cerebral hemorrhage can lead to numbness of half of the face and one hand, which may even be accompanied by dizziness, unsteady gait and short-lived consciousness disorder. When the scope of stroke is larger, in addition to numbness of half of the face and one hand, hemiplegia, epilepsy or different degrees of consciousness disorders will also occur. 2. Intracranial space-occupying lesions such as brain tumor, brain abscess, etc., with the increase of the lesion, it will gradually compress the brain tissues and nerves, resulting in numbness of half of the face and one hand, and hemiplegia, aphasia and epilepsy will also occur in some patients. When the numbness of half of the face and one hand occurs, it is recommended to go to the Neurology Department of regular hospitals in time, and under the guidance of the doctor to carry out cranial CT or MRI examination, to clarify the cause of the disease and then carry out further related treatment.