Foreign bodies in the ear are common, especially in children, but can occur in adults too. They can lead to discomfort, hearing loss, and infection if not promptly recognised and managed. Early and safe removal is essential to prevent complications and preserve ear function.
Causes
- Inorganic objects: Beads, small toys, buttons, stones
- Organic materials: Food particles, insects, cotton wool, seeds
- Accidental insertion: Common in children during play
- Intentional insertion: Seen in psychiatric illness or in prisoners
- Trauma-related: Parts of hearing aids or broken cotton bud tips lodged during cleaning
Pathophysiology
The foreign body may cause a local inflammatory reaction. Organic materials tend to swell and worsen symptoms by exerting pressure on the delicate ear structures. Sharp objects can cause abrasions, bleeding, and tympanic membrane (eardrum) perforation. Live insects may cause mechanical damage and irritation by movement.
Signs and Symptoms
- Ear pain (otalgia)
- Hearing loss (conductive)
- Feeling of fullness in the ear
- Discharge from the ear, often foul-smelling if infection is present
- Bleeding from the ear canal
- Tinnitus (ringing sensation)
- Vertigo, especially if the foreign body presses against the tympanic membrane
- Child may be irritable, crying, or pulling at the ear
Risk Factors
- Young age (particularly between 2-8 years)
- Access to small objects
- Lack of supervision during play
- Psychiatric disorders or cognitive impairment
- History of ear disease or surgery increasing ear canal vulnerability
Investigations
- Otoscopy: Essential for direct visualisation of the foreign body.
- Microscopy: In ENT clinics for better visualisation and removal under magnification.
- Audiometry: After removal if hearing loss persists.
- CT scan of the temporal bone: Only in complicated cases, such as suspected deep insertion, middle ear involvement, or if part of the object cannot be seen.
- Culture of ear discharge: If infection is suspected following prolonged foreign body retention.
Management
1. Non-Pharmacological Management
- Manual removal: With instruments like a Jobson Horne probe, suction, or forceps if the foreign body is easily accessible.
- Irrigation: Only for smooth, non-organic objects and an intact tympanic membrane; not recommended for organic materials (due to swelling) or batteries (risk of chemical injury).
- Insect removal: Immobilise first with mineral oil, alcohol, or lidocaine drops, then remove manually.
- Specialist referral: Immediate ENT referral for sharp objects, batteries, or deep-seated items.
2. Pharmacological Management
- Topical antibiotic drops: If there is trauma to the canal or signs of infection.
- Analgesics: Paracetamol or ibuprofen to relieve pain before and after removal.
- Antiseptics: Used post-removal if minor abrasions are present to prevent secondary infection.
3. Surgical Management
- Examination under anaesthesia (EUA): In children or uncooperative patients if the foreign body is not easily removable in a clinic setting.
- Microsurgical removal: By an ENT surgeon if complications like tympanic membrane perforation occur.
Complications
- External ear canal trauma
- Otitis externa (infection of the ear canal)
- Tympanic membrane perforation
- Middle ear infection or otitis media
- Persistent hearing loss if untreated or if the ear structures are damaged
- Foreign body aspiration if the object migrates to the airway during removal attempts
References
- NICE Clinical Knowledge Summary: Otitis externa and ear foreign bodies (2023)
- ENT UK Guidelines: Management of aural foreign bodies
- Royal College of Surgeons: ENT guidance for emergencies
- Royal College of Paediatrics and Child Health (RCPCH): Children’s ENT presentations
- GMC Good Medical Practice: Patient safety and clinical management