Under normal physiological conditions, the adenoids develop to the maximum at the age of 6-7 years, and gradually atrophy after the age of 10 years, and basically disappear when they become adults. The inflammation in the nasopharynx and its adjacent parts or the adenoids themselves repeatedly stimulates the pathological hyperplasia of the adenoids. I. Local symptoms 1. Nasal symptoms: often complicated by rhinitis and sinusitis, with symptoms such as nasal congestion and runny nose. When speaking, there is an occlusive nasal sound and snoring sound when sleeping. 2. Ear symptoms: stuffy and swollen ears, hearing loss, tinnitus. 3. Pharynx, larynx and lower respiratory tract symptoms: often cause paroxysmal cough and easily complicate bronchitis. 4. Severe cases have adenoidal appearance: long-term open-mouth breathing affects bone development, elongated maxilla, high arched palate, uneven teeth, poor bite, prominent upper incisors, thick lips, drooping jaw, and indifferent expression. Second, systemic symptoms 1, neuropsychiatric symptoms: sleep more nightmares, screaming, grinding teeth, urination, wheezing spasms or asthma. 2. Chronic toxicity symptoms: malnutrition, unresponsiveness, inattentiveness.