The cause of dizziness, on and off the air is mainly considered to be the following aspects: First, it may be a manifestation of plant nerve dysfunction, patients usually have more sleep disorders, emotional anxiety, tension, it is easy to appear central nervous system dysfunction, manifested as dizziness, on and off the air symptoms, but do head CT, transcranial Doppler examination and will not have positive signs. Secondly, dizziness and lack of air may be caused by insufficient blood supply to the brain, patients may have insomnia, dreaminess and memory loss, which can be clarified by doing transcranial Doppler examinations, usually patients should ensure a good quiet sleep environment, avoid overuse of the brain, mental tension, avoid eating spicy and stimulating food, and suggest patients to do more outdoor activities to regulate and relax the body.