Brain abnormality is a non-medical, professional term. The brain is mainly composed of the nervous system, and brain dysfunction contains several diseases. Common vascular lesions in middle-aged and elderly people are dominant, including cerebral infarction and cerebral hemorrhage, as well as infectious lesions, such as encephalitis, and common degenerative diseases, such as dementia and Parkinson’s. Any clinical manifestations of motor dysfunction, sensory dysfunction, as well as intellectual impairment and memory impairment, which may be related to the neurological function of the brain, should be promptly seen in the hospital.