Our hospital generally uses nasal endoscopy to confirm the diagnosis. In addition to clarifying the degree of adenoid hypertrophy, nasal endoscopy can also understand whether the child has other rhinitis or sinusitis diseases, but if the child is too young or cannot cooperate, lateral nasopharyngeal film examination is feasible, and CT is generally not recommended to confirm the diagnosis. If there is already a film or nasal endoscopy in an outside hospital, and it is clear and definite, further examination can be unnecessary.