The middle ear is normally an air filled cavity that connects to the back of the throat through a small tube called the Eustachian tube. When a child has a cold or similar upper respiratory tract infection the Eustachian tube that normally provides a drain for the middle ear becomes an entrance way for viruses to move up from the oropharynx through the Eustachian tube and into the middle ear. The infection causes inflammation of the Eustachian tube which then causes it to swell and close. This then causes a fluid buildup in the middle ear cavity which in turn puts pressure against the inner eardrum. The eardrum is a very thin membrane that is loaded with sensitive nerve fibers, any pressure against it is intensely painful.
Young children are more susceptible to ear infections than older children.
Their Eustachian tubes are small and allow for a greater likelihood of infection. Yes we know the obvious, such as a painful ear that leaves you crying for relief, but what about the symptoms that might help you catch an ear infection in the early stages. Younger children may appear fussy and irritable. They may have trouble sleeping, feeding, or hearing. Fever may also be present.