Snoring, also known as snoring, is very common in life, but this is also a disease, is not smooth after falling asleep whistling airflow and lead to a class of diseases, serious in the medical known as sleep apnea hypoventilation syndrome. The direct cause of snoring is the narrowing or obstruction of the whistle caused by poor airflow, the common clinical causes of narrowing or obstruction of the whistle are mainly the following three categories: the first category for obstructive reasons. It is caused by narrowing of the airway in the nose, throat and pharynx, such as obstruction of the nasal cavity caused by rhinitis, enlarged turbinates, enlarged tonsils or adenoids, and tumors in the throat, which can lead to narrowing of the airway. Among them, the most common cause of snoring in infants and children is enlarged tonsils or adenoids. The second category is central causes. We all know that the heartbeat is controlled by the nerve center, that nerve center if the control of abnormalities, resulting in sleep throat muscle relaxation, tongue down or back fall, will block the airway, snoring. This is more common in infants and children, especially premature babies, because the nervous system is not well developed. Adults, especially those with stroke sequelae, used not to snore, but started to do so after they became ill, mostly because of this reason. The third category is a mixture of causes, including both of these factors lead to snoring appear. So, there are many reasons for snoring while sleeping, and serious snoring can cause hyperventilation and hypoxia in the body, and dizziness, hypertension and other symptoms, the onset of children can affect the growth and development, you need to seek medical advice in a timely manner to identify the cause of the disease and take appropriate treatment measures.