Adenoids are lymphatic tissues in the pharynx. Enlarged adenoids or increased secretions can obstruct the posterior nostril, compress the Eustachian tube and irritate the pharynx to varying degrees, so they can lead to diseases. Adenoids, also known as pharyngeal tonsils, are located in the nasopharynx at the junction of the parietal and posterior walls, in the middle of the pharyngeal crypts on both sides, and are lymphatic tissues that gather in the mucous membranes of the parietal and posterior walls of the nasopharynx at the point where they migrate. Hypertrophied adenoids as well as more localized secretions can cause obstruction of the posterior nostrils. Nasal obstruction triggers inflammation of the nasal mucosa, which can lead to rhinitis, sinusitis and other diseases. In addition, enlarged adenoids can also compress the pharyngeal tube pharynx, causing obstruction, if at the same time nasopharyngitis attack, can lead to the pharyngeal tube dysfunction, thus triggering otitis media. In addition, adenoid hypertrophy, increased secretion, can stimulate the mucosa of the respiratory tract, can be manifested as pharyngeal foreign body sensation, paroxysmal cough and other symptoms. It is recommended that patients with enlarged adenoids should consult a doctor in time to check their condition and actively cooperate with the doctor for standardized treatment.