The third degree of adenoid hypertrophy in children is more serious and refers to adenoid hypertrophy enlargement blocking the posterior nostrils by 51% to 75%, which requires prompt medication or surgical treatment. Through the fiberoptic nasopharyngoscopy shows the degree of adenoids on the posterior nostril obstruction, adenoid hypertrophy can be divided into four degrees, in which the third degree of hypertrophy is adenoid hypertrophy obstruction of the posterior nostrils 51% ~ 75%, is a relatively serious situation, can be on the nasal cavity, sinus drainage caused by the impact of sinusitis, but also can be compressed pharyngeal eustachian tube complication of otitis media. Children need to consult the doctor in time for medication, surgery and other treatments, such as the use of mometasone furoate nasal spray to reduce the edema of the nasal mucosa, relieve nasal symptoms, if the drug treatment is ineffective, need to be timely through the adenoidectomy to improve the pharyngeal cavity, nasal cavity ventilation.