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Middle ear

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.

Primary Medical Reviewer Michael J. Sexton, MD
- Pediatrics
Specialist Medical Reviewer Charles M. Myer, III, MD
- Otolaryngology
Last Updated February 28, 2007

WebMD Medical Reference from Healthwise

Last Updated: February 28, 2007
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