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Ear infection - chronic

Chronic ear infection is fluid, swelling, or an infection behind the eardrum that does not go away or keeps coming back. It causes long-term or permanent damage to the ear.

Causes

The Eustachian tube runs from the middle of each ear to the back of the throat. This tube drains fluid made in the middle ear. If the Eustachian tube becomes blocked, fluid can build up. When this happens, infection can occur. A chronic ear infection develops when fluid or an infection behind the eardrum does not go away.

A chronic ear infection may be caused by:

"Suppurative chronic otitis" is a phrase doctors use to describe an eardrum that keeps rupturing, draining, or swelling in the middle ear or mastoid area and does not go away.

Ear infections are more common in children because their Eustachian tubes are shorter, narrower, and more horizontal than in adults. Chronic ear infections are much less common than acute ear infections.

Symptoms

Symptoms of a chronic ear infection may be less severe than symptoms of an acute infection. The problem may go unnoticed and untreated for a long time.

Symptoms may include:

Symptoms may continue or come and go. They may occur in one or both ears.

Exams and Tests

The health care provider will examine the ears. This may reveal:

  • Dullness, redness in the middle ear
  • Air bubbles in the middle ear
  • Thick fluid in the middle ear
  • Eardrum that sticks to the bones in the middle ear
  • Draining fluid from the eardrum
  • A hole (perforation) in the eardrum
  • An eardrum that bulges out or pulls back inward (collapses)

Tests may include:

  • Cultures of the fluid may show bacteria, and these bacteria may be harder to treat than the bacteria commonly involved in an acute ear infection.
  • A CT scan of the head or mastoids may show that the infection has spread beyond the middle ear.
  • Hearing tests may be needed.

Treatment

The health care provider may prescribe antibiotics if the infection is caused by bacteria. These medicines may need to be taken for a long time. They can be given by mouth or into a vein (intravenously).

If there is a hole in the eardrum, antibiotic ear drops are used. The health care provider may recommend using a mild acidic solution (such as vinegar and water) for a hard-to-treat infected ear that has a hole (perforation). A surgeon may need to clean out (debride) tissue that has gathered inside the ear.

Other surgeries that may be needed include:

  • Surgery to clean the infection out of the mastoid bone (mastoidectomy)
  • Surgery to repair or replace the small bones in the middle ear
  • Repair of the eardrum
  • Ear tube surgery

Outlook (Prognosis)

Chronic ear infections most often respond to treatment. However, your child may need to keep taking medicines for several months.

Chronic ear infections are not life threatening. However, they can be uncomfortable and may result in hearing loss and other serious complications.

Possible Complications

A chronic ear infection may cause permanent changes to the ear and nearby bones, including:

  • Infection of the mastoid bone behind the ear (mastoiditis)
  • Ongoing drainage from a hole in the eardrum that does not heal, or after the ear tubes are inserted
  • Cyst in the middle ear (cholesteatoma)
  • Hardening of the tissue in the middle ear (tympanosclerosis)
  • Damage to, or wearing away of the bones of the middle ear, which help with hearing
  • Paralysis of the face
  • Inflammation around the brain (epidural abscess) or in the brain
  • Damage to the part of the ear that helps with balance

Hearing loss from damage to the middle ear may slow language and speech development. This is more likely if both ears are affected.

Permanent hearing loss is rare, but the risk increases with the number and length of infections.

When to Contact a Medical Professional

Call your health care provider if:

  • You or your child has signs of a chronic ear infection
  • An ear infection does not respond to treatment
  • New symptoms develop during or after treatment

Prevention

Getting prompt treatment for an acute ear infection may reduce the risk of developing a chronic ear infection. Have a follow-up exam with the health care provider after an ear infection has been treated to make sure that it is completely cured.

Alternative Names

Middle ear infection - chronic; Otitis media - chronic; Chronic otitis media; Chronic ear infection

References

Kerschner JE. Otitis media. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 632.

Chole RA, Sudhoff HH. Chronic otitis media, mastoiditis, and petrositis. In: Cummings CW, Flint PW, Haughey BH, Robbins KT, Thomas JR, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, PA: Mosby Elsevier; 2010:chap 139.

Morris PS, Leach AJ. Acute and chronic otitis media. Pediatr Clin North Am. 2009 Dec;56(6):1383-99.

Update Date: 5/14/2014

Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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