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.
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 health care providers 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 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.
The health care provider will examine the ears. This may reveal:
Tests may include:
The 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 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:
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.
A chronic ear infection may cause permanent changes to the ear and nearby bones, including:
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.
Call your health care provider if:
Getting prompt treatment for an acute ear infection may reduce the risk of developing a chronic ear infection. Have a follow-up exam with your provider after an ear infection has been treated to make sure that it is completely cured.
Reviewed 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.