The adenoid is a lymphoepithelial tissue located in our nasopharynx, and it has certain immune functions. Under the stimulation of various factors such as infectious or immune factors, the immune tissue and glands of the adenoid hypertrophy, leading to enlarged adenoids. Once the adenoids are enlarged, they can block our posterior nasal apertures and the pharyngeal opening of the Eustachian tube. This, in turn, can cause us to snore, breathe through the mouth, and lead to secretory otitis media. The progression of the condition can affect our hearing, impact physical development, affect the development of the facial and jaw regions, and result in an adenoid facies. Therefore, when clinical symptoms of adenoid enlargement appear, active management is generally required, mainly surgical treatment.