Snoring is not the patent of adults, babies and young children can also snore loudly, and will hold their breath when they snore. Four-year-old Xiaobao has a three-year history of snoring, and the sound is so loud that it is comparable to that of my grandfather who is over 60 years old! When I went to the hospital for a checkup, I found that Xiaobao had habitually opened his mouth when he exhaled, and his tonsils and adenoids were enlarged, which required surgical treatment. Infants and toddlers with more serious snoring like him are common in outpatient clinics. Snoring is one of the most prevalent diseases in infants and children, about 3%. Many parents said in the clinic, originally thought that children snoring, is a good sleep, has not been concerned. In fact, it is not. Medically speaking, frequent snoring is also called “sleep apnea syndrome”, which is a breathing disorder that occurs during sleep. The cause of snoring in children is clear, the vast majority of tonsils and adenoids enlarged due to. 2 years old, due to changes in the immune mechanism, more external stimuli, the child’s upper respiratory tract of the lymphatic tissue will proliferate. In some cases, due to overgrowth, respiratory infections occur, and repeated infections stimulate further proliferation of lymphatic tissue; in other cases, the child is suffering from allergies, or overnutrition, which constantly stimulates the lymphatic tissue. Over time, lesions are formed. Children snoring, in addition to leading to sleep apnea, will seriously affect the growth and development, especially in infancy, snoring, the harm is greater. On the one hand, the nervous system of infants and young children is in the developmental stage, very sensitive to the lack of oxygen, which is very likely to affect the intellectual development of children. The growth hormone, which promotes the growth and development of children, is mainly secreted in the state of deep sleep at night. This kind of children will generally appear short stature, intellectual development disorder, inattention, irritability and hyperactivity, waking up grumpy and so on. Some data show that normal children can grow 5-7 centimeters a year, but snoring children may only grow one or two centimeters a year, or even not grow. On the other hand, the child’s head shape will also change. With frequent snoring, the jaw will become smaller. Due to open-mouth breathing, the development of the nose is restricted, and the typical “adenoid face” will appear: the nose is turned upwards, the nostrils are in the sky, the teeth on the top are separated, the jaw is small, and it looks a bit silly. Parents should observe whether the child often snores for more than half an hour during sleep, has difficulty breathing, or sleeps on his/her back, with knees bent to the chest, neck hyperextended, head turned to the side, nose opening and closing, intercostal and suprasternal depressions, and open-mouth breathing. If so, it is important to seek medical attention as soon as possible. Tonsil and adenoidectomy is a treatment with significant therapeutic benefits due to its clear cause. Once diagnosed, early surgery is advisable. Before surgery, a polysomnography (PSG) can be done to see if the child has sleep apnea syndrome. If not, surgery can be postponed and other methods can be used under the guidance of the doctor. In rare cases of snoring caused by obesity, eating control and exercise are needed to reduce weight.