Mastoiditis is a serious bacterial infection that affects the mastoid bone behind the ear. It's usually more common in children, although adults can also sometimes be affected.
Symptoms of mastoiditis
The mastoid bone has a honeycomb-like structure that contains air spaces called mastoid cells. The mastoid cells help maintain the air space in the middle ear.
Mastoiditis can develop if the mastoid cells become infected or inflamed. This is often as a result of a persistent middle ear infection (otitis media). This can cause the porous bone to break down.
Symptoms of mastoiditis typically include:
- redness, tenderness and pain behind the ear
- swelling behind the ear that can cause it to stick out
- discharge from the ear
- a high temperature, irritability and tiredness
- hearing loss in the affected ear
When to see your GP
You should see your GP if you or your child has:
- any symptoms of mastoiditis
- an ear infection that doesn't clear up with treatment or is followed by new symptoms
- been diagnosed with mastoiditis and treatment hasn't cleared it up
Causes of mastoiditis
Mastoiditis usually occurs following an untreated middle ear infection. Bacteria from the middle ear can spread to the inner ear, infecting the mastoid cells of the mastoid bone.
cholesteatoma can also cause mastoiditis. This is an abnormal collection of skin cells inside the ear. This may prevent the ear draining properly, leading to infection.
How mastoiditis is diagnosed
Most ear infections are middle ear infections. If your GP thinks you have mastoiditis as a complication of a middle ear infection, they may refer you to an ear, nose and throat (ENT) specialist.
How mastoiditis is treated
Mastoiditis is a serious infection and should be treated quickly. It's treated with antibiotics.
Depending on how severe the infection, you may need to go to hospital so that you can be given antibiotics directly into a vein through a drip.
In some cases, surgery may be needed to drain your middle ear (a myringotomy) or to remove part of the mastoid bone (mastoidectomy).
If you've had surgery for mastoiditis, you may need to take time off work. Your doctor will advise you about this.
Take care not to get the affected ear wet. You should be able to wash your hair after about a week, providing you don't get water inside your ear.
You should be able to go swimming around four to six weeks after the operation, depending on how well your ear has healed. Your doctor should be able to advise you at your follow-up appointment.
With early antibiotic treatment, most people with mastoiditis recover quickly and have no complications. However, treatment isn't always easy and the infection may come back.
More useful links
The information on this page has been adapted from original content from the NHS website.
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