Objective: The purpose of this study was to determine whether any relationship exists between an external acoustic meatus foreign body and undiagnosed ear disorders in children. Methods: In this prospectively designed case-control study, 46 sequential children with an external acoustic meatus foreign body comprised the study group and 46 children who do not have ear, nose and throat (ENT) complaints comprised the control group. The study group children were underwent tympanometry after removal of the foreign body, and tympanometry was also performed on the children in the control group. The data included age, sex, side of ear with the foreign body, foreign body type, duration of the presence of the foreign body, the details of its removal, and tympanometry type. Results: Fifteen (32.6%) children with a foreign body in the external acoustic meatus in the study group had type A tympanometry, seven (15.2%) had type C1, nine (19.6%) had type C2, and fifteen (32.6%) had type B. In contrast, 34 (73.9%) children in the control group had type A tympanometry, five (10.9%) had type C1, three (6.5%) had type C2, and four (8.7%) had type B. The percentage of children with type B tympanometry was significantly higher (p=0.005) in the study group, and the percentage with type A tympanometry was significantly higher (p<0.001) in the control group. Conclusion: Clinical and statistical evidence suggests that dysfunction of Eustachian tube and serous otitis media may lead to irritation in children's ears, which could prompt them to put something in their ears to ease the irritation. We suggest that all children with a foreign body in the external acoustic meatus should be seen by an otologist to prevent delay in diagnosing middle ear problems. The presence of a foreign body in the external acoustic meatus may point to an ear disease in children and should not be ignored.