The adenoids are part of the inner ring of the pharyngeal lymphatic ring and proliferate with age, reaching a peak in development at the age of 6-7 years, and then gradually shrinking. Large adenoids that affect the function of adjacent organs or affect general health are called adenoid hypertrophy and require surgical treatment. Allergic rhinitis is a chronic inflammatory disease of the nasal mucosa involving IgE caused by exposure to allergens in a susceptible individual. So what is the connection between the two? According to our follow-up study on some cases of adenoid hypertrophy combined with allergic rhinitis and adenoidectomy, we found that after surgical removal of adenoids in children with adenoid hypertrophy combined with allergic rhinitis, the symptoms of allergic rhinitis were relieved or disappeared within 3-6 months in a short period of time, and after one year, some cases had allergic rhinitis symptoms again, but the symptoms were easily controlled by medication. It is presumed that the adenoids, as part of the endolymphatic ring, are sites for the production of antibodies to allergens in the nasopharynx, and can also adsorb allergens and bacteria to produce a persistent allergic state and chronic infectious inflammation. Removal of the adenoids also removes part of the lesion and facilitates the remission or healing of allergic rhinitis. Therefore, surgical removal of adenoids is necessary for allergic rhinitis combined with adenoid hypertrophy.