If you are experiencing a medical emergency please dial 911 immediately
Most ear infections form in the middle ear. The eustachian tube carries fluid from the middle ear to the throat. Sometimes during a cold, the eustachian tube becomes swollen and fluid is trapped in the middle ear. Bacteria or viruses can grow in this fluid and form an ear infection.
Last Revised: September 10, 2012
Author: Healthwise Staff
Medical Review: Susan C. Kim, MD - Pediatrics & Charles M. Myer, III, MD - Otolaryngology
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