Children are more likely than adults to get ear infections for these reasons:
The eustachian tubes in young children are shorter and more horizontal. This shape encourages fluid to gather behind the eardrum. The immune system of children, which in the body’s infection-fighting system, is still developing. The adenoids in children are relatively larger than they are in adults. The adenoids are the small pads of tissue above the throat and behind the nose and near the eustachian tubes. As they swell to fight infection, they may block the normal ear drainage from the eustachian tube into the throat. This blockage of fluid can lead to a middle ear infection.