An ear infection (otitis media) is an inflammation of the middle ear, usually caused by bacteria when fluid builds up behind the eardrum. This may be caused by colds, allergies, excess mucus, upper respiratory tract infection or changes in air pressure and swollen adenoids. Unfortunately, children are more susceptible to getting an ear infection. In fact, according to the National Institute on deafness and Other Communication Disorders (NIH), five out of six children will have at least one ear infection by their third birthday. Therefore, many concerned parents bring their child to a medical practitioner to seek treatment and course of action.