Risk factors

Risk factors for ear infections include:

• Age. Children between the ages of 6 months and 2 years are more susceptible to ear infections because of the size and shape of their eustachian tubes and because their immune systems are still developing.
• Group child care. Children cared for in group settings are more likely to get colds and ear infections than are children who stay home. The children in group settings are exposed to more infections, such as the common cold.
• Infant feeding. Babies who drink from a bottle, especially while lying down, tend to have more ear infections than do babies who are breast-fed.
• Seasonal factors. Ear infections are most common during the fall and winter. People with seasonal allergies may have a greater risk of ear infections when pollen counts are high.
• Poor air quality. Exposure to tobacco smoke or high levels of air pollution can increase the risk of ear infections.
• Alaska Native heritage. Ear infections are more common among Alaska Natives.
• Cleft palate. Differences in the bone structure and muscles in children who have cleft palates may make it more difficult for the eustachian tube to drain.