Adenoid hypertrophy is also called pharyngeal tonsillar hyperplasia. Mild adenoid hypertrophy in children is often physiological, the nasopharynx of infants at birth is lymphoid tissue, and with age and proliferation, 6 years of age is the maximum degree, and then gradually shrink, if it affects the general health or the function of adjacent organs, only then is called adenoid hypertrophy. Common manifestations 1, local manifestations: children due to adenoid hypertrophy blocking the posterior nostril and pharyngeal pharyngeal opening, can occur otorhinopharyngeal and other symptoms. The manifestation is open-mouth breathing during sleep, backward tongue root often snoring, restless sleep at night, nasal secretion, occlusive nasal sound when speaking, voice slurred. As a result of long-term open-mouth breathing, the facial bone development is impaired, the maxilla becomes longer, the hard palate is high arched, the teeth are uneven, the upper incisors are exposed, the lips are thick, the face lacks expression, and there is dementia, forming an “adenoid face”. The ataxic movement between swallowing and breathing is dysfunctional, and choking and coughing often occur. The downward flow of secretions stimulates the mucous membrane of the respiratory tract and makes it easy to suffer from bronchitis. Due to the obstruction of the eustachian tube, it is easy to cause non-suppurative otitis media resulting in hearing loss and tympanic membrane invagination. 2, systemic symptoms: often have systemic nutrition and developmental disorders, mainly manifested as chronic poisoning reflex neurological symptoms, such as sluggish expression, chest tightness and restlessness, poor lung expansion, over time to cause chicken chest or flat chest. A few due to chronic nasal obstruction, long-term hypoxia and pulmonary heart disease, and even acute heart failure. The nasopharynx can be palpated and soft masses can be palpated. If necessary, lateral nasopharyngeal radiographs can be taken to help diagnose and treat the disease. Treatment Surgical removal of adenoids is the best treatment for adenoid hypertrophy, and radiotherapy can be considered for those who are not suitable for surgery. At present, our department adopts the minimally invasive nasal endoscopic low-temperature plasma adenoidectomy technique, which is a more advanced treatment method. The operation time is short, and the child’s reaction after the operation is small, and there is no bleeding during and after the operation.