Usually, CT of the brain can be used to assist in diagnosis if symptoms such as head pain, dizziness, limb disorder and speech disorder are present. 1. Head pain: if there is head pain of different degrees or head pain of long duration, brain CT examination can be performed in order to detect brain diseases, such as craniocerebral tumors, skull fracture, cerebral hemorrhage and so on. 2. Dizziness: If there is frequent dizziness, CT brain examination can be performed in order to detect cerebral infarction and other diseases. 3. Limb disorder: if there are problems of limb dysfunction, such as unsteady walking, frequent falling, unilateral or bilateral limb incoordination, etc., the patient can be examined by brain CT in order to detect the presence of cerebral hemorrhage, cerebral infarction and other diseases. 4. Speech disorder: If there are symptoms of speech disorder, such as slurred speech, it is recommended to undergo brain CT examination in order to prevent the occurrence of cerebrovascular diseases such as cerebral infarction. If the above symptoms exist, you should seek medical treatment in time, and through brain CT and other imaging examinations, assist the physician to make a diagnosis, so that treatment can be carried out as soon as possible.