Adenoid hypertrophy can be diagnosed through clinical manifestations and auxiliary examinations, mainly including: 1) children with open mouth breathing, and some patients can have a typical “adenoid face” during sleep; 2) examination of the oropharynx: the patient can see a high and narrow hard palate, and the posterior wall of the pharynx can see viscous secretions flowing down from the nasopharynx. Most patients have tonsillar hypertrophy; 3. anterior rhinoscopy: it can be seen that there is a large amount of secretion in the nasal cavity and the mucosa of the nasal cavity is swollen; 4. fiberoptic nasopharyngoscopy: it is currently the most common method of adenoids examination, and under the endoscope, it can be seen that there are longitudinal fissure-like orange flap-like lymphatic tissues on the surface of the nasopharyngeal roof and posterior wall, which usually block more than 2/3 of the posterior nostril; 5. Hypertrophy: The degree of obstruction of the nasopharyngeal airway can be measured by radiographs to determine the degree of adenoid hypertrophy; 6. Nasopharyngeal palpation: Clinically, the patient’s pharyngeal cavity can be reached by hand to palpate the size of adenoid hypertrophy in the nasopharynx, and the softness and size of the mass can be felt in the parietal and posterior walls of the nasopharynx. The airway in the nasopharynx is narrowed and deformed, and the posterior wall tissue is thickened, but the density is uniform.