Otitis: ear inflammation — types, causes, symptoms, diagnosis, and treatment

Otitis is inflammation or infection of the ear. This article explains outer, middle and inner ear disease, common causes and symptoms, diagnostic methods, treatments, prevention and historical notes.

Otitis is a medical term for inflammation or infection affecting any part of the ear. The condition occurs in humans and many animals and is categorized by the anatomical site involved: the outer ear, the middle ear, or the inner ear. Clinical features, causes and management differ according to location and severity.

Types of otitis

Otitis externa ("swimmer's ear"): inflammation of the ear canal and outer ear, often caused by water exposure, trauma from cleaning, or topical infection.
Otitis media: inflammation of the middle ear behind the eardrum; common in infants and children and frequently follows upper respiratory infections.
Otitis interna (inner ear disease): affects structures involved in hearing and balance; clinical names include labyrinthitis or vestibular neuritis when balance is primarily affected.

Symptoms and diagnosis

Typical symptoms across types include ear pain, reduced hearing, ear discharge, pressure or fullness, tinnitus (ringing) and sometimes fever or headache. Inner ear involvement may cause vertigo, nausea and balance difficulty. Diagnosis is clinical and usually begins with otoscopic examination to inspect the ear canal and eardrum. When needed, clinicians use pneumatic otoscopy, tympanometry, hearing tests or imaging to assess fluid, structural damage or complications.

Causes and risk factors

Bacteria and viruses are the most common infectious agents; fungi can cause chronic otitis externa. Risk factors include recent swimming, upper respiratory infections, allergies, Eustachian tube dysfunction, young age, smoke exposure and anatomical variations of the ear or throat.

Treatment, prevention and prognosis

Treatment is site-specific: topical ear drops and canal cleaning for otitis externa; analgesics, watchful waiting or systemic antibiotics for many cases of otitis media; supportive care, steroids or vestibular rehabilitation for inner ear problems in selected cases.
Chronic or recurrent middle-ear disease may require procedures such as myringotomy with tympanostomy tubes or referral to an ear specialist.
Prevention strategies include vaccination against common bacterial pathogens, breastfeeding in infancy, reducing secondhand smoke, careful ear hygiene and protective measures for swimmers.

Complications are uncommon with prompt care but can include persistent hearing loss, tympanic membrane perforation, mastoiditis or the formation of cholesteatoma. Archaeological and paleopathological studies have even identified signs consistent with ear infections in ancient human remains, indicating that otitis is a long-standing health issue. For clinical guidance and more detailed resources see further reading.