Children with adenoid hypertrophy, its harm is far greater than adults, the main harm includes the following aspects: 1, due to nasal obstruction, patients appear open-mouth breathing, accompanied by snoring, serious apnea, oxygen deprivation, easy to convulsions, affecting children’s growth and development; 2, long-term oxygen deprivation can affect the development of the brain, daytime depression or lethargy, poor appetite, inattentive, hyperactivity, and so on. Some patients have slow reaction and short temper; 3, long-term open-mouth breathing can affect the development of facial bone, manifested as short upper lip, sagging jaw, nasolabial groove disappearance, high arch of hard palate, teeth arrangement is not neat, bad bite, etc., to form a special “adenoid face”; 4, due to the long-term breathing, resulting in the lungs expanding poorly, can cause chicken chest or flat chest, and can also lead to the development of the chest. 4, due to long-term poor breathing, resulting in poor lung expansion, can cause chicken chest or flat chest, or long-term hypoxia can be complicated by pulmonary heart disease; 5, hypertrophied adenoids block the posterior nostrils and the eustachian tube, can repeatedly appear rhinitis, sinusitis, secretory otitis media, affecting the patient’s sense of smell and hearing.