“Signs include allergic shiners, Dennie lines (the accentuated lines below the margin of lower eyelids), frequent otitis media, and pale and swollen turbinates. The conjunctivae are often injected, with prominent palpebral conjunctivae and/or frequent tearing. Persons who chronically breathe through their mouth typically have narrow and elevated palates, enlarged tonsils, and a cobblestone appearance of the posterior pharyngeal wall. Children often have elongated adenoid facies with signs of overbite. They often speak with heavily nasal voices.”
Quoted from emedicine.com