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.

Oct 21, 2025 · Mastoiditis is a serious bacterial infection that affects the mastoid process, or the bone and air cells surrounding the inner and middle ear. Learn more.

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.

Learn about mastoiditis symptoms, causes, and treatments, including antibiotics, surgery, and home care tips. Discover how to manage this serious ear infection effectively.

Feb 10, 2023 · Mastoiditis is a serious infection of the mastoid, the hard, prominent bone just behind and under the ear. It is rare and can be life threatening without treatment. Symptoms 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.

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 …

Dec 18, 2025 · Mastoiditis is defined as the inflammation and infection of the mastoid process, which is the bony prominence located behind the ear. This condition often occurs when an ear infection …