Mastoiditis

Mastoiditis is an infection of the mastoid bone of the skull. The mastoid is located just behind the ear.

Mastoiditis - side view of head

Mastoiditis is an infection of the bony air cells in the mastoid bone, located just behind the ear. It is rarely seen today because of the use of antibiotics to treat ear infections. This child has drainage from the ear and redness (erythema) behind the ear over the mastoid bone.

Mastoiditis - redness and swelling behind ear

Mastoiditis is an infection of the bony air cells in the mastoid bone, located just behind the ear. It is rarely seen today because of the use of antibiotics to treat ear infections. This child has noticeable swelling and redness behind his right ear because of mastoiditis.

Mastoidectomy - series - Normal anatomy

Mastoid air cells are open, air-containing spaces in one of the skull bones.

Causes

Symptoms

Exams and Tests

Treatment

Outlook (Prognosis)

Possible Complications

When to Contact a Medical Professional

Prevention