The adenoid is located in the lymphatic epithelial tissue of the nasopharyngeal area. Enlargement of the adenoid can block breathing and obstruct the pharyngeal opening of the Eustachian tube, leading to secretory otitis media, and may result in secondary infections of the sinuses. Therefore, for symptoms such as snoring and hearing loss that occur simultaneously after adenoid enlargement, surgical removal is performed. The adenoid does not have a complete capsule, so it is only possible to remove the adenoid tissue as much as possible, and it cannot guarantee the complete removal of all adenoid tissue. Therefore, there is a small rate of recurrence after adenoid removal, with a recurrence rate of about 0.5%, meaning that the recurrence leading to the reappearance of symptoms is around 0.5%. Whether further treatment is needed after recurrence requires an in-person assessment at a hospital.