The classification of sleep apnea hypoventilation syndrome includes two major categories, obstructive and central, and of course there are other subcategories. The common one is the obstructive sleep apnea hypoventilation syndrome, which is related to snoring, and it often causes a series of changes after the upper airway is obstructed or the airflow is not smooth when snoring is strong, which can be very harmful to sleep and health condition. The central sleep apnea hypoventilation syndrome mostly originates from the central nervous system, including the brain, especially the medulla oblongata, and these central system lesions cause the performance of sleep apnea hypoventilation syndrome. Of course, there are other classifications of sleep apnea hypoventilation syndrome, which need to be further screened in the hospital to be able to distinguish the specific type of apnea hypoventilation syndrome, so it is recommended that patients with similar conditions must promptly go to the hospital for examination and treatment.