Snoring in children is harmful and early treatment is effective. Snoring during children’s sleep is a relatively common phenomenon during childhood, and not many parents will treat this phenomenon as a disease, not to mention the awareness of the dangers of snoring. Some parents mistakenly believe that their children will be fine when they grow up, and will tell you whose children snored when they were young, but now nothing is wrong. If other members of the family (especially parents) have snoring symptoms, the symptoms may be ignored as a family problem. However, doctors who study sleep have taken it very seriously and have given the phenomenon a complicated and strange name: “childhood obstructive sleep apnea hypoventilation syndrome (OSAHS)”. Since the 1970s, clinicians have conducted a series of studies on the dangers of this phenomenon, and in recent years there have been many new discoveries and insights into the etiology, pathophysiology, symptoms and treatment of this disease. As children are in a period of rapid physical and mental growth and development, the long-term occurrence of sleep apnea and hypoventilation may cause damage to the heart, lungs, brain and other important organs of the child, causing growth deformities. Some scholars believe that “sudden infant death syndrome”, a disease that is difficult to diagnose before death, is also related to OSAHS. Therefore, the treatment of sleep disordered breathing is of special importance in childhood and must be taken seriously by doctors and parents for timely diagnosis and treatment. Childhood is an important stage in the formation of breathing patterns. When breathing through the nose during sleep, the neural reflex generated by the airflow through the nasal cavity can excite the pharyngeal opening muscle to enlarge the pharyngeal cavity. When nasal and nasopharyngeal obstruction occurs with open-mouth breathing, the action of the pharyngeal opening muscle is significantly reduced and the pharyngeal airway is narrowed. Therefore, nasal obstruction is an important factor in the development of OSAHS in children. The causes of OSAHS in children are significantly different compared to adults and are more often seen in adenoids and/or tonsillar hypertrophy. Foreign statistical results show that about 10% of children have snoring symptoms. The results of a survey on children’s sleep conditions in eight cities in China show that the incidence of frequent snoring in children’s sleep is 5.7% and sleep apnea is 0.4%. How can parents determine that their children may have OSAHS? There are some phenomena and characteristics that parents need to understand and pay attention to: it must be clear that not all sleep snoring is OSAHS, and only when certain criteria are met will doctors diagnose OSAHS. some children show hyperactivity, irritability and inattention. Developmental delay is one of the main features of OSAHS in children during the growth period, which is characterized by short stature, low weight, loss of appetite, and a relatively higher incidence of OSAHS in morbidly obese children. Adenoid facies is present in about 15% of children with OSAHS. Apnea occurs frequently during sleep snoring, and such children often show violent turning over after a period of apnea, or even waking up with a long breath and then going back to sleep, some of them can be accompanied by night sweats, kicking the blanket, easily catching a cold, and some even show micturition and sleepwalking. Due to the complexity of this disease, even experienced doctors must use modern examination methods and integrate many factors such as medical history and physical examination to make an accurate diagnosis and develop a reasonable treatment plan and program accordingly. Therefore, when parents find their children snoring, they should go to a professional hospital for examination in time. Especially for children who are obese, have enlarged tonsils, abnormal craniofacial development and are prone to upper respiratory tract infection, they should pay more attention. At present, the common examination methods include checking the size of tonsils, measuring adenoids by nasopharyngeal lateral X-ray or CT or applying nasal endoscopy to check the adenoids and observe whether they block the pharyngeal orifice of the pharynx. Polysomnography (PSG) is considered the “gold standard” for the diagnosis of sleep disordered breathing disorders and is essential for the diagnosis of obstructive sleep apnea in children. These tests and techniques are non-invasive or minimally invasive and virtually painless for children. Once the diagnosis of OSAHS in children is made, prompt treatment is necessary to reduce the risk of serious complications such as developmental delays. Early treatment of children in the age group of 3-6 years must be emphasized. Surgical removal of the enlarged adenoids and palatine tonsils is more than 90% effective and has a good prognosis. For children who are not eligible for surgery or for the few children who still have sleep apnea after surgery, non-invasive positive pressure ventilation can be used and most of them can be cured.