When a child has an upper respiratory infection, such as a cold, then viruses or bacteria can be trapped behind the eardrum and swelling develops. Fluid is then trapped in the middle ear and the bacteria and viruses then multiply in this area, resulting in an infected eardrum.
Research shows some habits that make ear infections more likely.
Bottle feeding when the child is lying down on his back, use of pacifiers, and exposure to cigarette smoke can lead to ear infections. Prevnar immunizes the child against S. pneumoniae bacteria, which cause 40 percent of ear infections in very young children. Preventing the flu by vaccination can also help. Choking occurs when food or an object blocks the airway. Keep toys with small or broken parts and small toys, marbles, and balls away from young children.