What is a middle ear infection?

A middle ear infection, also called otitis media, is a common, often painful, type of ear infection that occurs behind the eardrum. Middle ear infections are caused by bacteria or viruses. A middle ear infection can interfere with the normal process of hearing and result in ear pain, hearing impairment, and other symptoms. People of all ages can get a middle ear infection; however, it is more common in infants and young children.

Your ear is divided into three sections: the outer ear (includes the ear and ear canal), the middle ear (includes the eardrum and three tiny bones called ossicles), and the inner ear. Hearing occurs when sound waves travel through the outer ear and into the middle ear, where they cause vibration of the eardrum and ossicles. These vibrations are then transmitted through the inner ear, converted into electrical impulses, and translated by the brain as sound.

The Eustachian tubes are responsible for equalizing air pressure in the middle ear and allowing mucus to drain from the middle ear to the throat. Sometimes, however, the tube can become blocked by congestion, which causes fluid from the middle ear to build up. Bacteria or viruses can enter the middle ear through the Eustachian tubes, leading to an ear infection.

There are two types of middle ear infections:

  • Acute otitis media usually follows a viral upper respiratory tract infection, such as a cold or flu.

  • Chronic otitis media is an ongoing middle ear infection that can occur after acute otitis media or because of a poorly healed ruptured eardrum.

Treatment for a middle ear infection varies depending on the specific type of infection. Treatment may include oral medications, ear drops, or surgical procedures in severe cases.

Complications of a middle ear infection can be serious in some cases and result in permanent hearing loss, brain abscess, meningitis, and other problems.

Seek prompt medical care if you, or your child, have symptoms of a middle ear infection, such as ear pain and drainage, or if a middle ear infection is not getting better. Seek immediate medical care (call 911) if you or your child, someone you are with, develops seizures, lethargy, or a change in alertness.

SYMPTOMS

What are the symptoms of a middle ear infection?

Symptoms of a middle ear infection can vary and differ depending on the specific type of infection.... Read more about middle ear infectionsymptoms

CAUSES

What causes a middle ear infection?

Normally, fluid in the middle ear drains through the Eustachian tube to the throat. When the Eustachian tube becomes blocked or swollen, the fluid builds up in the middle ear. Bacteria and viruses grow and multiply easily when fluid in the middle ear does not drain normally. Conditions that cause swelling or blockage of the Eustachian tube include:... Read more about middle ear infectioncauses

TREATMENTS

How is a middle ear infection treated?

Treatment generally involves an individualized, multifaceted plan that addresses the infection, minimizes ear pain, and reduces the possibility of complications, such as hearing loss.... Read more about middle ear infectiontreatments

Medical Reviewer: McDonough, Brian MD Last Annual Review Date: Jan 5, 2011 Copyright: © Copyright 2011 Health Grades, Inc. All rights reserved. May not be reproduced or reprinted without permission from Health Grades, Inc. Use of this information is governed by the HealthGrades User Agreement.

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