Otitis Media: Types, Diagnosis, Treatment and Complications
Otitis media is inflammation of the middle-ear cleft, the air-containing system behind the tympanic membrane that includes the tympanic cavity, Eustachian tube and mastoid air cells. The term covers several related but clinically different conditions: acute otitis media (AOM), otitis media with effusion (OME or glue ear), recurrent acute disease and chronic suppurative otitis media (CSOM).
Correct classification matters. A child with a bulging, inflamed tympanic membrane and acute pain may need analgesia and, in selected cases, an antibiotic. A child with painless middle-ear fluid and hearing difficulty usually needs hearing assessment and observation rather than antibiotics. A persistently discharging perforated ear needs careful aural toilet, non-ototoxic topical treatment and assessment for chronic disease or cholesteatoma.
Do not diagnose acute otitis media from a red tympanic membrane alone. A reliable diagnosis requires acute symptoms plus middle-ear effusion and convincing inflammation, especially a bulging tympanic membrane or new otorrhoea not caused by otitis externa.
Learning objectives
- Define and distinguish acute, recurrent, effusive and chronic suppurative otitis media.
- Explain the role of Eustachian-tube dysfunction in middle-ear disease.
- Recognise the symptoms and otoscopic findings of each type.
- Select appropriate investigations and interpret hearing tests.
- Apply safe treatment, antimicrobial stewardship and follow-up.
- Identify complications requiring urgent ENT or hospital referral.
Relevant anatomy and pathophysiology
The middle ear lies between the tympanic membrane and inner ear. It contains the ossicles—malleus, incus and stapes—which transmit sound to the cochlea. The Eustachian tube connects the middle ear to the nasopharynx and equalises pressure, ventilates the middle ear and clears secretions. Review the structure of the external, middle and inner ear before continuing.
Viral infection, allergy, adenoidal enlargement or craniofacial abnormality can obstruct the tube. Young children are particularly vulnerable because their tubes are shorter, narrower and more horizontal.
Position, colour, translucency, landmarks and mobility provide evidence about pressure and fluid behind the membrane. Bulging is a particularly important sign of AOM.
The mastoid air cells communicate with the middle ear. Untreated or aggressive infection can spread posteriorly and cause acute mastoiditis or intracranial complications.
Typical disease sequence
- Upper-respiratory inflammation: A viral cold, rhinitis or adenoidal inflammation causes Eustachian-tube oedema.
- Poor ventilation: Gas is absorbed from the middle ear, creating negative pressure and tympanic-membrane retraction.
- Effusion: Sterile or infected fluid collects behind the tympanic membrane and reduces ossicular movement, producing conductive hearing loss.
- Acute infection: Viruses and bacteria from the nasopharynx may enter the middle ear, producing pus, pressure, pain and tympanic-membrane bulging.
- Perforation or persistence: The membrane may rupture and discharge. Repeated infection, poor drainage or a persistent perforation may lead to CSOM, retraction pockets or cholesteatoma.
Classification of otitis media
| Condition | Definition and key features | Main management principle |
|---|---|---|
| Acute otitis media | Rapid onset of middle-ear inflammation and effusion, usually with otalgia, fever or irritability and a bulging tympanic membrane. | Analgesia for all; observation or an oral antibiotic according to age, severity, risk and local guidance. |
| AOM with perforation | Acute symptoms followed by spontaneous tympanic-membrane rupture and new purulent otorrhoea, sometimes with sudden pain relief. | Keep the ear dry, treat the acute infection appropriately and confirm healing of the perforation. |
| Otitis media with effusion | Non-purulent middle-ear fluid without acute infection. Hearing difficulty is more prominent than pain or fever. | Assess hearing and impact; observe and reassess, with hearing support or ENT intervention if persistent and significant. |
| Recurrent AOM | Commonly defined as at least 3 episodes in 6 months or at least 4 in 12 months, including 1 in the preceding 6 months. | Confirm that episodes are genuine AOM, address risk factors and assess hearing, adenoids and need for ENT review. |
| Chronic suppurative otitis media | Persistent or recurrent discharge through a tympanic-membrane perforation. The Uganda Clinical Guidelines use discharge lasting more than 14 days. | Aural toilet, non-ototoxic topical antimicrobial treatment, dry-ear care, hearing assessment and ENT review when persistent or complicated. |
| Cholesteatoma or unsafe chronic ear | Keratinising epithelium grows in a retraction pocket or through a perforation and may erode ossicles, mastoid or adjacent structures. | Urgent ENT assessment; definitive treatment is usually surgical. |
Causes and risk factors
Important organisms in acute disease
- Streptococcus pneumoniae.
- Non-typeable Haemophilus influenzae.
- Moraxella catarrhalis, especially in children.
- Respiratory viruses, either alone or with bacterial infection.
Chronic discharging ears may contain different and multiple organisms, including Pseudomonas aeruginosa, Staphylococcus aureus and other Gram-negative bacteria. Treatment should therefore not be assumed to be identical to uncomplicated AOM.
Predisposing factors
- Age under 2 years and an immature Eustachian tube.
- Recent viral upper-respiratory infection, rhinitis or sinus disease.
- Adenoidal hypertrophy or chronic adenoid infection.
- Day-care attendance, crowding and frequent exposure to respiratory infection.
- Exposure to tobacco smoke or indoor air pollution.
- Supine bottle-feeding and absence of breastfeeding.
- Cleft palate, Down syndrome or another craniofacial anomaly.
- Allergic rhinitis, immunodeficiency, HIV infection or poor nutrition.
- Incomplete pneumococcal, Haemophilus influenzae type b or influenza immunisation.
- Previous AOM, persistent OME or a damaged tympanic membrane.
Clinical presentation
Acute otitis media
- Rapid onset of ear pain; a young child may tug the ear, cry, sleep poorly or refuse feeds.
- Fever, irritability, reduced appetite, vomiting or symptoms of a preceding cold.
- A blocked sensation, reduced hearing or tinnitus.
- Purulent discharge when the tympanic membrane perforates.
- Adults may report marked otalgia, pressure and unilateral hearing reduction.
Otoscopic findings in AOM
- Moderate or severe bulging of the tympanic membrane is strongly diagnostic.
- Mild bulging together with recent otalgia or marked tympanic-membrane erythema may support the diagnosis.
- The membrane becomes opaque, landmarks and the cone of light are lost, and mobility is reduced on pneumatic otoscopy.
- Yellow fluid or pus may be visible behind the membrane.
- After perforation, pus may fill the canal; cleaning under direct vision may be needed to see the perforation.
Crying, fever and an upper-respiratory infection can make the tympanic membrane appear red. If there is no bulging, no effusion and normal membrane mobility, seek another cause of the symptoms rather than prescribing an antibiotic for AOM.
Otitis media with effusion
- Fluctuating or persistent hearing difficulty, often affecting both ears.
- Delayed speech, inattentiveness, increased television volume or reduced school performance.
- Aural fullness, popping or tinnitus; pain and fever are usually absent.
- A dull, retracted or amber tympanic membrane, an air-fluid level or bubbles behind it and reduced mobility.
Chronic suppurative otitis media
- Persistent or recurrent discharge from one or both ears for more than 14 days.
- A visible tympanic-membrane perforation and conductive hearing loss.
- Systemic symptoms are usually absent in uncomplicated disease.
- Granulation tissue, a polyp, persistent bleeding, foul-smelling scant discharge or white keratin debris raises concern for cholesteatoma or other destructive disease.
Assessment and investigations
Focused history
- Onset and duration of pain, fever, discharge and hearing change.
- Previous AOM, chronic discharge, ear operations, trauma or ventilation tubes.
- Recent URTI, allergic rhinitis, snoring, mouth breathing or adenoidal symptoms.
- Speech, language, school performance and behavioural effects in children.
- Antibiotic exposure, allergy, adherence and response to previous treatment.
- HIV status, diabetes, immunosuppression, malnutrition and vaccination history where relevant.
Examination
- Record temperature and general condition; assess hydration and age-specific danger signs.
- Inspect the pinna, tragus, canal and post-auricular area before otoscopy.
- Use a clean, appropriately sized speculum and examine both ears with the basic ENT instruments.
- Document tympanic-membrane position, colour, translucency, landmarks, integrity and mobility.
- Assess facial movement, balance, neck stiffness and neurological function if disease is severe.
- Examine the nose, nasopharynx, oral cavity, tonsils and cervical lymph nodes for associated pathology.
When tests are useful
| Investigation | Use | Interpretation or limitation |
|---|---|---|
| Pneumatic otoscopy | Assesses tympanic-membrane mobility and supports detection of middle-ear effusion. | Reduced mobility occurs in AOM and OME; interpret with symptoms and membrane position. |
| Tympanometry | Objectively assesses middle-ear pressure and membrane mobility, especially in OME. | A flat type-B trace supports effusion but must be interpreted with ear-canal volume and otoscopy. |
| Audiometry | Measures hearing loss in persistent OME, recurrent AOM and chronic disease. | Middle-ear fluid usually causes conductive hearing loss; unexpected sensorineural loss needs specialist assessment. |
| Ear-discharge microscopy and culture | Useful in CSOM, recurrent or treatment-resistant discharge, immunocompromise or unusual infection. | Collect after gentle cleaning and before a new antimicrobial when possible; review correct ENT swab collection. |
| CT temporal bone | Used when mastoiditis, cholesteatoma, bone erosion or an intracranial complication is suspected. | Not required for routine uncomplicated AOM or OME. |
| Other tests | FBC, CRP, blood culture, HIV testing or glucose according to severity and clinical context. | Routine blood tests are unnecessary in a well patient with uncomplicated disease. |
See the broader guide to ordering and interpreting ENT investigations. Persistent unilateral OME in an adult requires ENT assessment of the nasopharynx to exclude an obstructing lesion.
Differential diagnosis
| Condition | Clues that favour it |
|---|---|
| Otitis externa | Marked tragal or pinna tenderness, swollen inflamed ear canal and pain on inserting the speculum. |
| Impacted wax or foreign body | Canal obstruction without a bulging tympanic membrane; discharge may occur if a foreign body becomes infected. |
| OME rather than AOM | Effusion and reduced hearing without acute pain, fever or a markedly bulging membrane. |
| Referred otalgia | Normal ear examination with dental disease, tonsillitis, temporomandibular-joint disorder or pharyngeal pathology. |
| Bullous myringitis | Painful vesicles or bullae on the tympanic membrane; middle-ear effusion may coexist. |
| Mastoiditis | Post-auricular pain, swelling and erythema with loss of the sulcus and outward displacement of the pinna. |
Management of acute otitis media
1. Relieve pain and support recovery
- Give regular paracetamol or ibuprofen at an age- and weight-appropriate dose when not contraindicated.
- Encourage fluids and feeding; manage associated fever and nasal symptoms conservatively.
- Do not insert oil, herbs, matchsticks, cotton buds or unprescribed drops into the ear.
- Antihistamines and decongestants do not routinely improve uncomplicated AOM.
2. Decide whether an antibiotic is required
Many mild cases improve without an antibiotic. Observation or a delayed prescription may be considered when the diagnosis is secure, illness is mild, follow-up is reliable and the patient is not at high risk. Immediate antibiotics are more strongly considered for severe or systemic illness, otorrhoea from perforation, very young children with bilateral disease, immunocompromise, significant comorbidity or a high risk of complications.
For diagnosed acute suppurative otitis media, Uganda's national guidance lists amoxicillin as first-line treatment, together with analgesia and review. Always calculate a child's dose from the current weight and check the current national or facility guideline, formulation and allergy history before prescribing.
Adult: 500 mg orally every 8 hours for 5 days.
Child: 15 mg/kg per dose orally every 8 hours for 5 days, according to Uganda Clinical Guidelines 2023.
Adult: 500 mg orally every 6 hours.
Child: 10–15 mg/kg per dose orally every 6 hours. Confirm allergy type, interactions and current local guidance.
Review at about 5 days or earlier if worsening. Failure to improve within 48–72 hours requires reassessment of the diagnosis, adherence, obstruction, resistant organisms and complications.
Do not simply repeat or broaden antibiotics without re-examining the ear. A persistently bulging membrane, ongoing fever, severe pain or new post-auricular signs may require ENT assessment, tympanocentesis or treatment for a complication.
3. Care of spontaneous perforation
- Keep the ear dry and gently wick away discharge; do not occlude it deeply with cotton wool.
- Avoid potentially ototoxic ear drops when the tympanic membrane is perforated unless a specialist has specifically prescribed them.
- Confirm that discharge resolves and the membrane heals. Persistent perforation or discharge should be managed as chronic middle-ear disease.
Management of otitis media with effusion
- Confirm OME and assess hearing: Use otoscopy, tympanometry and age-appropriate audiometry where available.
- Explain the natural history: Many effusions resolve spontaneously after an acute infection or cold.
- Reduce functional impact: Seat the child near the teacher, gain attention before speaking, reduce background noise and monitor speech and school performance.
- Reassess: Bilateral OME with hearing loss is generally reassessed after about 3 months; intervene earlier if hearing difficulty substantially affects daily life.
- Consider autoinflation: A cooperative child may benefit from supervised autoinflation using an appropriate device.
- Refer when persistent or significant: Options include hearing aids or bone-conduction devices, ventilation tubes (grommets) and selected adenoid surgery.
Do not prescribe antibiotics, oral or nasal steroids, antihistamines or decongestants solely to clear OME. They do not provide reliable lasting benefit and may cause harm. Treat a separate allergic or infectious condition only when independently diagnosed.
Management of chronic suppurative otitis media
Core treatment
- Aural toilet: Remove pus and debris by safe dry wicking or suction under direct vision so that topical medicine reaches the middle ear. Review the principles and technique of aural toilet.
- Topical non-ototoxic antibiotic: Uganda Clinical Guidelines 2023 recommend ciprofloxacin ear drops after drying the ear. Follow the current local dose and duration; prolonged unsupervised use encourages resistance and fungal overgrowth.
- Dry-ear precautions: Prevent water from entering during bathing or swimming and stop inserting objects or unverified remedies.
- Culture when indicated: Obtain a properly collected swab if discharge is recurrent, persistent or treatment-resistant.
- Assess hearing and cause: Look for a persistent perforation, granulation, foreign body, cholesteatoma, adenoidal disease, HIV or another contributor.
Routine systemic antibiotics are not recommended for uncomplicated CSOM because topical treatment reaches the infected site more effectively and unnecessary systemic use promotes resistance. Systemic therapy is reserved for spreading infection, systemic illness or a complication and should follow local or specialist guidance.
Irrigation of a perforated or acutely inflamed ear can cause pain, vertigo or deeper contamination. Any irrigation specified in a local protocol must be performed by a trained clinician using the correct solution and technique; patients should never syringe a discharging ear at home.
When surgery may be needed
- Tympanoplasty to repair a persistent perforation and improve hearing.
- Ossicular reconstruction when the sound-conducting chain is damaged.
- Mastoid surgery for cholesteatoma, persistent destructive infection or complications.
Complications and emergency red flags
| Complication | Warning features |
|---|---|
| Acute mastoiditis | Post-auricular pain, fever, erythema and swelling, loss of the post-auricular sulcus and a pinna pushed outward or downward. |
| Facial-nerve palsy | New facial asymmetry, inability to close the eye or reduced movement on the affected side. |
| Labyrinthitis | Severe vertigo, vomiting, imbalance or new sensorineural hearing loss. |
| Meningitis or intracranial abscess | Severe headache, neck stiffness, photophobia, altered consciousness, seizures or focal neurological signs. |
| Venous-sinus thrombosis | Persistent fever, headache, papilloedema, neurological deterioration or septic appearance. |
| Long-term hearing and developmental effects | Persistent conductive loss, speech delay, poor school performance, ossicular erosion or irreversible inner-ear damage. |
Arrange same-day hospital or ENT assessment for post-auricular swelling, a displaced pinna, facial weakness, severe vertigo, meningeal signs, altered consciousness, seizures, severe systemic illness, a very young unwell infant or suspected cholesteatoma with complications.
Prevention and patient education
- Keep childhood immunisations up to date, including pneumococcal and Haemophilus influenzae type b vaccines; influenza vaccination may reduce viral triggers where indicated.
- Promote breastfeeding and avoid feeding a young infant flat on the back with a bottle.
- Protect children from tobacco smoke and reduce harmful indoor air pollution.
- Use hand hygiene and respiratory etiquette to reduce spread of upper-respiratory infections.
- Manage cleft palate, adenoidal disease, allergic rhinitis and immunodeficiency appropriately.
- Seek assessment for persistent ear discharge, hearing difficulty, delayed speech or repeated infections.
- Explain that chronic discharge is infection—not “milk in the ear”—and should not be treated with traditional liquids or unsafe objects.
Nursing and primary-care responsibilities
- Assess pain, fever, feeding, hydration and age-specific danger signs.
- Examine both ears gently and document the tympanic membrane, discharge and post-auricular region.
- Administer and teach correct weight-based analgesia and prescribed antimicrobials.
- Demonstrate dry wicking and topical-drop technique when managing a discharging ear.
- Check adherence, medicine allergy and whether the child is improving within the expected time.
- Screen for hearing, speech and school difficulties and ensure audiology or ENT follow-up when needed.
- Escalate mastoid, neurological, vestibular or facial-nerve signs immediately.
Clinical reasoning example
Scenario: A 20-month-old child develops fever, irritability and right-sided ear pain after a cold. Otoscopy shows a markedly bulging, opaque tympanic membrane with loss of landmarks. Tragal pressure causes little additional pain, and there is no post-auricular swelling.
- Most likely diagnosis: Acute otitis media, because acute symptoms are accompanied by middle-ear effusion and a bulging tympanic membrane.
- Immediate priorities: Relieve pain, assess hydration and systemic illness, and inspect for perforation or mastoid signs.
- Antibiotic decision: Consider the child's age, severity and bilateral or unilateral disease, then follow Uganda Clinical Guidelines and the facility protocol.
- Follow-up: Review promptly if symptoms worsen or do not improve within 48–72 hours; recheck hearing if effusion or hearing difficulty persists.
- Emergency change: New swelling behind the ear, outward displacement of the pinna, neck stiffness or altered consciousness requires urgent hospital referral.
Knowledge-check summary
- AOM requires acute symptoms, middle-ear effusion and convincing inflammation; a bulging tympanic membrane is the key sign.
- OME causes fluid and hearing difficulty without acute infection; antibiotics do not clear it.
- CSOM presents with persistent or recurrent discharge through a perforation and needs aural toilet, safe topical treatment and hearing assessment.
- Marked tragal tenderness and a swollen canal favour otitis externa rather than otitis media.
- Post-auricular swelling with a displaced pinna suggests mastoiditis.
- Persistent unilateral OME in an adult requires assessment for nasopharyngeal obstruction.
- Facial weakness, severe vertigo, meningeal signs or altered consciousness are emergency red flags.
Selected references
- Uganda Ministry of Health: Uganda Clinical Guidelines 2023.
- Centers for Disease Control and Prevention: Outpatient Clinical Care for Pediatric Populations.
- NICE Guideline NG91: Otitis Media (Acute)—Antimicrobial Prescribing.
- NICE Guideline NG233: Otitis Media with Effusion in Under 12s.
- World Health Organization: Primary Ear and Hearing Care Training Manual.
- World Health Organization: Chronic Suppurative Otitis Media—Burden of Illness and Management Options.
