Drowsiness and lack of clarity may be caused by lack of sleep, insufficient blood supply to the brain or neurasthenia, etc. Patients can take general treatment and medication according to their condition. 1. Lack of sleep: when patients stay up late for a long time, it will lead to lack of sleep, causing dizziness all day and unclear brain symptoms. At this time, sleep habits should be adjusted appropriately to ensure sufficient sleep time, and try to avoid staying up all night. 2. Insufficient cerebral blood supply: When cerebral arteriosclerosis or cervical spondylosis occurs, it can lead to cerebral circulatory disorders, resulting in insufficient cerebral blood supply, ischemia and hypoxia of cerebral tissues, which affects the brain function and makes the patients suffer from the above symptoms. Patients should take aspirin, clopidogrel and nimodipine as prescribed by doctors. 3. Neurasthenia: mental stress in daily life may cause neurasthenia, the disease will also make the patient appear the above symptoms. Patients can appropriate physical exercise or travel therapy, help to improve the state of tension, relieve mental stress, relieve symptoms. All day dizziness, brain unclear patients should also go to the hospital in a timely manner, to take the appropriate method of treatment.