Mastoiditis is an infection of part of the large bone behind your ear. It’s caused by untreated middle ear infections. Symptoms include ear pain and drainage.

Mastoiditis is the result of an infection that extends to the air cells of the skull behind the ear. Specifically, it is an inflammation of the mucosal lining of the mastoid antrum and mastoid air cell …

May 2, 2025 · Mastoiditis is a severe complication of otitis media characterized by infection of the mastoid bone. Symptoms of mastoiditis include tenderness, redness, or swelling behind the ear, as …

Mastoiditis - Learn about the causes, symptoms, diagnosis & treatment from the MSD Manuals - Medical Consumer Version.

May 2, 2024 · Mastoiditis is most often caused by a middle ear infection (acute otitis media). The infection may spread from the ear to the mastoid bone. This bone has a honeycomb-like structure …

Acute mastoiditis is a complication of acute otitis media (AOM). The middle ear cavity and mastoid air spaces are continuous. During an episode of AOM, the mucosa lining the middle ear, and often that …

Mastoiditis is inflammation and infection of the mast cells in the mastoid bone. Learn the causes, symptoms, diagnosis, treatment guidelines, and complications of mastoiditis.

Sep 12, 2023 · WebMD discusses the symptoms, causes, and treatment of mastoiditis, a sometimes serious bacterial infection of a bone behind the ear.

Mar 28, 2018 · As the mastoid is contiguous to and an extension of the middle ear cleft, virtually every child or adult with acute otitis media (AOM) or chronic middle ear inflammatory disease has mastoiditis.

Oct 21, 2025 · Mastoiditis is a serious bacterial infection that develops in the mastoid process (bony projection behind the earlobe), which contains bone and air cells surrounding the middle ear. This …