The eustachian tube drains fluid from your ears to the back of your throat. If it clogs, otitis media with effusion (OME) can occur.
If you have OME, the middle part of your ear fills with fluid, which can increase the risk of ear infection.
OME is very common. According to the Agency of Healthcare Research and Quality, about 90 percent of children will have OME at least once by the age of 10.