Adenoids, also called pharyngeal tonsils or proliferators, are located at the top of the nasopharynx and the back wall of the pharynx and are lymphatic tissue with an orange flap-like surface. The adenoids, like the tonsils, grow gradually with age after birth, proliferating between the ages of 2 and 6, and gradually shrinking after the age of 10. Adenoid hypertrophy is a pathological hyperplasia of the adenoids due to repeated stimulation of inflammation, which causes nasal congestion and open-mouth breathing, especially aggravated at night, snoring and sleep disturbance, and children often turn over from time to time, more obvious when lying on their backs, and in severe cases, apnea can occur. This disease is most often seen in children and is often combined with chronic tonsillitis and tonsillar hypertrophy.