The adenoids are a piece of tissue behind the nose above the tonsils, and adenoid hyperplasia occurs in children. In most children, adenoids enlarge normally in early childhood, usually shrink as the child gets older, and disappear during adolescence. However, in some children, the adenoids continue to get larger and block the passages behind the nose, which can lead to snoring and breathing through the mouth. Once the organism is adenoidal hyperplasia, common clinical manifestations include rhinitis, sinusitis, hearing loss, tinnitus, and adenoidal facies. If the adenoids are overgrown, it is easy to affect the growth and development of the child, because there will be a serious lack of oxygen during sleep leading to insufficient supply for brain development, which leads to a decrease in the secretion of growth hormone in the brain, which will affect the height of the child and the resistance of the body. If the adenoids are too large and have affected the normal respiratory function of the child, the size of the adenoids is usually detected by the following methods: determination of the adenoids by X-ray, nasopharyngeal ratio (lateral cephalometric X-ray), optical endoscopy, direct measurement during surgery, etc. Surgical treatment is taken after conservative treatment has failed, and surgical treatment is used to make the child breathe smoothly by using adenoids removal. So once a child has symptoms of adenoid hyperplasia, it is important to pay attention to it as a parent.