Children are particularly prone to middle-ear infection, because their Eustachian tubes, which ventilate the middle ear and drain off fluids, are narrow and can become blocked easily.
Preventing middle ear infection
Prevent infection of the middle ear by not putting your baby or toddler to bed with a bottle. Milk that runs into the ear may cause infection.
Also don't allow children who have grommets to swim or bath without wearing good plastic or silicone earplugs.
If water that contains bacteria gets into the inner ear they could end up with an ear infection and possibly deafness.