Benda Asing Hidung
Published on October 9, 2026
Risk Factors
Children aged 2 to 5 years, intellectual disability, psychiatric illness, incarcerated individuals. Peak incidence in toddlers who explore objects by inserting them into body orifices.
Etiology
Insertion of an exogenous object into the nasal cavity (beads, buttons, food particles, seeds, sponge fragments, small toy parts, button/disc batteries, insects).
Presentation
Unilateral nasal obstruction, unilateral foul-smelling or purulent nasal discharge. Often brought by a parent who witnessed the event, or presents days to weeks later with unexplained unilateral rhinorrhea.
Classic Exam
Visible foreign body on anterior rhinoscopy; unilateral mucosal edema, granulation tissue, or crusting around the object. Foul odor on the affected side. No contralateral findings.
Diagnostics
Clinical diagnosis via anterior rhinoscopy (with or without nasal endoscopy). Plain radiograph of the paranasal sinuses (Waters view) can detect radiopaque objects. CT scan reserved for complications or unclear cases.
Management
Removal under direct visualization using alligator forceps, suction catheter, or balloon catheter (Fogarty or Katz extractor). Positive-pressure techniques ("mother's kiss") for cooperative settings. Button battery requires emergent removal. Topical decongestant and anesthesia before extraction.
Keywords
"Unilateral foul-smelling nasal discharge in a child," "toddler with one-sided nasal obstruction," "purulent rhinorrhea, unilateral," "button battery in the nose."
01Pathophysiology
A nasal foreign body causes disease through a straightforward sequence of mechanical obstruction followed by local inflammatory response. When an object lodges in the nasal cavity, it obstructs normal mucociliary clearance on that side. The cilia can no longer sweep mucus posteriorly toward the nasopharynx, and secretions begin to pool around the object. This stagnation creates an environment conducive to secondary bacterial infection, which is why the hallmark presentation is unilateral purulent, foul-smelling discharge.
The nasal cavity is narrowest at the nasal valve (the anterior-most portion near the vestibule) and at the junction between the inferior turbinate and the nasal septum. Most foreign bodies lodge along the floor of the nasal cavity or just anterior to the inferior turbinate, because these are the paths of least resistance during insertion.
Organic foreign bodies (food, seeds, sponge, paper) tend to absorb moisture and swell over time, worsening obstruction and accelerating the inflammatory response. They also decompose, producing the characteristic foul odor. Inorganic foreign bodies (beads, plastic toy parts, buttons) are generally inert and may remain asymptomatic for prolonged periods, sometimes discovered incidentally.
Button (disc) batteries represent a true emergency. When a button battery contacts the moist nasal mucosa, it generates an electrical current that produces sodium hydroxide (an alkaline solution) at the negative pole through electrolysis. This causes liquefactive necrosis of the mucosa, which can progress to septal perforation within as few as 2 to 4 hours of contact. This is the single most dangerous type of nasal foreign body and must be recognized and acted upon immediately.
Magnets pose a similar urgent risk when two magnets are inserted (one in each nostril, or one magnet and one metallic object), as they can compress the septum between them and cause pressure necrosis and perforation.
If a nasal foreign body remains undetected for months to years, calcium and magite salts may deposit around it, forming a rhinolith, a calcified mass that can erode surrounding structures.
02Classification and Clinical Manifestation
By Material
Organic
Examples
Seeds, beans, nuts, food particles, sponge, paper, cotton
Clinical Behavior
Absorb moisture and swell; decompose rapidly; produce foul odor early; higher infection risk
Inorganic (inert)
Examples
Beads, buttons, plastic toy parts, pebbles, erasers
Clinical Behavior
Do not swell; may remain asymptomatic for weeks to months; lower immediate infection risk
Inorganic (reactive/caustic)
Examples
Button/disc batteries
Clinical Behavior
Cause liquefactive necrosis via alkaline burn; risk of septal perforation within hours
Magnetic
Examples
Small magnets (toy magnets, magnetic beads)
Clinical Behavior
If bilateral or paired with a metallic object, causes septal compression necrosis
Type | Examples | Clinical Behavior |
|---|---|---|
Organic | Seeds, beans, nuts, food particles, sponge, paper, cotton | Absorb moisture and swell; decompose rapidly; produce foul odor early; higher infection risk |
Inorganic (inert) | Beads, buttons, plastic toy parts, pebbles, erasers | Do not swell; may remain asymptomatic for weeks to months; lower immediate infection risk |
Inorganic (reactive/caustic) | Button/disc batteries | Cause liquefactive necrosis via alkaline burn; risk of septal perforation within hours |
Magnetic | Small magnets (toy magnets, magnetic beads) | If bilateral or paired with a metallic object, causes septal compression necrosis |
By Timeline
Acute
Time Frame
Minutes to hours after insertion
Manifestation
Nasal obstruction (unilateral), sneezing, nasal irritation, mild epistaxis, and the child may cry or become distressed. If witnessed, the history is clear.
Subacute
Time Frame
Days to weeks
Manifestation
Unilateral mucopurulent discharge, foul odor, nasal crusting, worsening obstruction. Parents may report "a cold that won't go away on one side."
Chronic/Neglected
Time Frame
Weeks to months
Manifestation
Granulation tissue formation around the object, recurrent unilateral epistaxis, sinusitis symptoms, periorbital cellulitis (rare), rhinolith formation (if calcification occurs).
Button battery (emergency)
Time Frame
As early as 2 hours
Manifestation
Rapid mucosal necrosis, dark discoloration/eschar of septal mucosa, bloody or brown-tinged discharge, septal perforation, and in severe cases cartilage destruction.
Phase | Time Frame | Manifestation |
|---|---|---|
Acute | Minutes to hours after insertion | Nasal obstruction (unilateral), sneezing, nasal irritation, mild epistaxis, and the child may cry or become distressed. If witnessed, the history is clear. |
Subacute | Days to weeks | Unilateral mucopurulent discharge, foul odor, nasal crusting, worsening obstruction. Parents may report "a cold that won't go away on one side." |
Chronic/Neglected | Weeks to months | Granulation tissue formation around the object, recurrent unilateral epistaxis, sinusitis symptoms, periorbital cellulitis (rare), rhinolith formation (if calcification occurs). |
Button battery (emergency) | As early as 2 hours | Rapid mucosal necrosis, dark discoloration/eschar of septal mucosa, bloody or brown-tinged discharge, septal perforation, and in severe cases cartilage destruction. |
03Diagnostic Workup
Anterior rhinoscopy
Role
Best initial test
Key Finding
Direct visualization of the foreign body or surrounding mucosal changes (edema, granulation tissue, purulent discharge)
Nasal endoscopy (rigid or flexible)
Role
Confirmatory when rhinoscopy is inconclusive
Key Finding
Superior visualization of posteriorly located or deeply embedded objects
Plain radiograph (Waters/AP view)
Role
Adjunct for radiopaque objects
Key Finding
Identifies metallic objects, button batteries, teeth, stones. Cannot detect plastic, food, or paper.
CT scan (non-contrast, axial)
Role
Reserved for complications or uncertain cases
Key Finding
Detects all foreign body types including radiolucent; evaluates for sinusitis, abscess, bony erosion, or rhinolith
Test | Role | Key Finding |
|---|---|---|
Anterior rhinoscopy | Best initial test | Direct visualization of the foreign body or surrounding mucosal changes (edema, granulation tissue, purulent discharge) |
Nasal endoscopy (rigid or flexible) | Confirmatory when rhinoscopy is inconclusive | Superior visualization of posteriorly located or deeply embedded objects |
Plain radiograph (Waters/AP view) | Adjunct for radiopaque objects | Identifies metallic objects, button batteries, teeth, stones. Cannot detect plastic, food, or paper. |
CT scan (non-contrast, axial) | Reserved for complications or uncertain cases | Detects all foreign body types including radiolucent; evaluates for sinusitis, abscess, bony erosion, or rhinolith |
Anterior rhinoscopy is the best initial diagnostic step. After applying a topical vasoconstrictor (such as oxymetazoline or phenylephrine spray) to decongest the nasal mucosa and improve the field of view, the examiner uses a nasal speculum and headlight to inspect the nasal cavity. In most pediatric cases, the foreign body is visible sitting on the floor of the nose or just anterior to the inferior turbinate.
If the object is not seen on anterior rhinoscopy but clinical suspicion remains high (unilateral discharge, foul smell, history of insertion), the next step is nasal endoscopy. A rigid or flexible endoscope allows examination of the posterior nasal cavity and nasopharynx, which rhinoscopy alone cannot adequately visualize.
Plain radiography is useful when a metallic or radiopaque foreign body is suspected, or when a button battery must be confirmed. A Waters view (occipitomental projection) is preferred for evaluating the nasal cavity and paranasal sinuses. On the film, a button battery has a characteristic "double ring" or "halo" sign on the anteroposterior view and a "step-off" sign on the lateral view, which distinguish it from a coin or simple disc.
CT imaging is not routinely necessary but becomes important when there is suspicion of a retained foreign body fragment after attempted removal, when complications such as sinusitis or orbital cellulitis develop, or when a rhinolith is suspected in a chronic or neglected case.
04Management and Treatment
Pre-procedure preparation
Intervention
Topical vasoconstrictor + topical anesthesia
Details
Oxymetazoline 0.05% spray or phenylephrine; lidocaine 2-4% spray or pledget
Simple anterior foreign body (cooperative patient)
Intervention
Positive-pressure technique ("mother's kiss")
Details
Parent occludes unaffected nostril and delivers a short puff of air into the child's mouth while sealing it
Simple anterior foreign body (in-office)
Intervention
Instrumented removal under direct vision
Details
Alligator forceps, right-angle hook, suction tip, or balloon catheter (Fogarty or Katz extractor)
Posterior or impacted foreign body
Intervention
Removal under sedation or general anesthesia in OR
Details
Rigid endoscopic guidance; risk of posterior displacement and aspiration necessitates controlled airway
Button battery
Intervention
Emergent removal
Details
Do NOT irrigate with saline. Remove as quickly as possible. Post-removal: inspect for septal perforation, apply 0.25% acetic acid irrigation to neutralize residual alkali
Post-removal
Intervention
Inspection, topical antibiotics if mucosal damage present
Details
Re-examine both nostrils (a second foreign body is found in up to 10% of cases). Saline irrigation for crusting. Follow-up if mucosal injury is present.
Scenario | Intervention | Details |
|---|---|---|
Pre-procedure preparation | Topical vasoconstrictor + topical anesthesia | Oxymetazoline 0.05% spray or phenylephrine; lidocaine 2-4% spray or pledget |
Simple anterior foreign body (cooperative patient) | Positive-pressure technique ("mother's kiss") | Parent occludes unaffected nostril and delivers a short puff of air into the child's mouth while sealing it |
Simple anterior foreign body (in-office) | Instrumented removal under direct vision | Alligator forceps, right-angle hook, suction tip, or balloon catheter (Fogarty or Katz extractor) |
Posterior or impacted foreign body | Removal under sedation or general anesthesia in OR | Rigid endoscopic guidance; risk of posterior displacement and aspiration necessitates controlled airway |
Button battery | Emergent removal | Do NOT irrigate with saline. Remove as quickly as possible. Post-removal: inspect for septal perforation, apply 0.25% acetic acid irrigation to neutralize residual alkali |
Post-removal | Inspection, topical antibiotics if mucosal damage present | Re-examine both nostrils (a second foreign body is found in up to 10% of cases). Saline irrigation for crusting. Follow-up if mucosal injury is present. |
Step 1: Stabilize and prepare. Ensure the patient is calm. In a pediatric setting, this often requires a parent's lap, gentle restraint (papoose board), or procedural sedation if the child is highly uncooperative. Apply a topical vasoconstrictor (oxymetazoline 0.05%, 1 to 2 sprays) and topical anesthetic (lidocaine 4% spray or a lidocaine-soaked cotton pledget placed at the anterior nasal cavity for 5 to 10 minutes). The vasoconstrictor shrinks the mucosa, widens the nasal passage, and reduces bleeding risk.
Step 2: Choose the removal technique based on the object's shape and location.
Round, smooth objects (beads, marbles): A right-angle hook or ball-tipped probe is passed behind the object and drawn forward. Forceps tend to push round objects further posteriorly and should be avoided for these.
Irregular or graspable objects (paper, sponge, food): Alligator forceps or Hartmann forceps work well for objects with an edge that can be grasped.
Suction-assisted removal: Attach a Frazier suction tip or a dedicated suction catheter to the object and withdraw it. Effective for objects with a flat surface.
Balloon catheter technique: Pass a Fogarty catheter (5 or 6 French) past the foreign body, inflate the balloon, and withdraw the catheter, dragging the object anteriorly. This is effective for round, smooth objects located deeper in the cavity.
Positive-pressure technique ("mother's kiss"): The parent covers the child's mouth with their own, occludes the unaffected nostril with a finger, and delivers a brief, firm puff of air. The pressure behind the foreign body pushes it anteriorly. This technique has a reported success rate of approximately 60% and carries minimal risk when the child is cooperative.
Step 3: Address button batteries as an emergency. A button battery lodged in the nasal cavity must be removed as quickly as possible, ideally within 2 hours of insertion. Do not irrigate with saline, as saline conducts electricity and accelerates the electrochemical burn. After removal, irrigate the nasal cavity with 0.25% acetic acid (dilute vinegar) to neutralize any residual alkali. Inspect the septum carefully for perforation or necrosis. Schedule close follow-up.
Step 4: Post-removal care. After extraction, always inspect the nasal cavity for a second foreign body (bilateral insertion occurs in up to 10% of pediatric cases). If there is mucosal injury, apply a topical antibiotic ointment (mupirocin or bacitracin) to the affected area twice daily for 5 to 7 days. Prescribe saline nasal irrigation for crusting and congestion. Oral antibiotics (amoxicillin-clavulanate, 25 to 45 mg/kg/day in divided doses for 7 days) are reserved for cases with established secondary sinusitis or significant surrounding infection.
Contraindications and cautions:
Avoid blind probing or multiple attempts, as each failed attempt increases mucosal edema, bleeding, and the risk of pushing the object posteriorly into the nasopharynx (with subsequent aspiration risk).
If two or more in-office attempts fail, proceed to removal under general anesthesia in a controlled operating room setting, where the airway can be protected.
05Differential Diagnosis and Distractors
Unilateral choanal atresia
Why It Is Similar
Unilateral nasal obstruction in a child; inability to pass a catheter on one side
Key Discriminator
Present since birth (congenital); CT shows bony or membranous plate at the posterior choana; no foul discharge unless superinfected; catheter fails to pass through to the nasopharynx
Allergic rhinitis
Why It Is Similar
Nasal congestion and rhinorrhea in a child
Key Discriminator
Bilateral symptoms (sneezing, watery discharge, nasal itching); pale, boggy turbinates; no foul odor; seasonal or perennial pattern; responds to antihistamines
Acute bacterial sinusitis
Why It Is Similar
Purulent nasal discharge, facial pain, fever
Key Discriminator
Usually bilateral (or at least not strictly unilateral in a classic fashion); preceded by an upper respiratory infection lasting more than 10 days; no visible foreign body on rhinoscopy
Adenoid hypertrophy
Why It Is Similar
Chronic nasal obstruction and mouth breathing in a child
Key Discriminator
Bilateral obstruction; snoring and sleep-disordered breathing; lateral neck radiograph shows enlarged adenoid pad; no foul-smelling unilateral discharge
Nasal polyp
Why It Is Similar
Unilateral nasal mass causing obstruction
Key Discriminator
Smooth, pale, glistening, pedunculated mass that is insensate to touch; in children, a unilateral nasal polyp should raise concern for cystic fibrosis (sweat chloride test indicated); no history of insertion
Rhinolith
Why It Is Similar
Unilateral nasal obstruction with foul discharge
Key Discriminator
Actually a long-standing, calcified foreign body; presents in older children or adults; hard, gritty mass seen on rhinoscopy; CT shows calcified density; history of foreign body insertion may be remote or forgotten
Unilateral epistaxis (trauma)
Why It Is Similar
Bleeding from one nostril in a child
Key Discriminator
History of nose-picking or facial trauma; no foul discharge; no visible object on rhinoscopy; bleeding resolves with pressure or cautery
Differential | Why It Is Similar | Key Discriminator |
|---|---|---|
Unilateral choanal atresia | Unilateral nasal obstruction in a child; inability to pass a catheter on one side | Present since birth (congenital); CT shows bony or membranous plate at the posterior choana; no foul discharge unless superinfected; catheter fails to pass through to the nasopharynx |
Allergic rhinitis | Nasal congestion and rhinorrhea in a child | Bilateral symptoms (sneezing, watery discharge, nasal itching); pale, boggy turbinates; no foul odor; seasonal or perennial pattern; responds to antihistamines |
Acute bacterial sinusitis | Purulent nasal discharge, facial pain, fever | Usually bilateral (or at least not strictly unilateral in a classic fashion); preceded by an upper respiratory infection lasting more than 10 days; no visible foreign body on rhinoscopy |
Adenoid hypertrophy | Chronic nasal obstruction and mouth breathing in a child | Bilateral obstruction; snoring and sleep-disordered breathing; lateral neck radiograph shows enlarged adenoid pad; no foul-smelling unilateral discharge |
Nasal polyp | Unilateral nasal mass causing obstruction | Smooth, pale, glistening, pedunculated mass that is insensate to touch; in children, a unilateral nasal polyp should raise concern for cystic fibrosis (sweat chloride test indicated); no history of insertion |
Rhinolith | Unilateral nasal obstruction with foul discharge | Actually a long-standing, calcified foreign body; presents in older children or adults; hard, gritty mass seen on rhinoscopy; CT shows calcified density; history of foreign body insertion may be remote or forgotten |
Unilateral epistaxis (trauma) | Bleeding from one nostril in a child | History of nose-picking or facial trauma; no foul discharge; no visible object on rhinoscopy; bleeding resolves with pressure or cautery |
06Traps and High-Yield Pearls
The single most tested concept regarding nasal foreign bodies is the recognition pattern: a child between 2 and 5 years old presenting with unilateral, foul-smelling, purulent nasal discharge. The word "unilateral" is the anchor. Many students see "purulent nasal discharge in a child" and immediately jump to sinusitis or an upper respiratory infection. The question writer is testing whether you recognize that unilateral purulent rhinorrhea in a young child is a foreign body until proven otherwise. Any time a vignette describes one-sided symptoms in this age group, foreign body should be at the top of your differential.
The second high-yield trap involves button batteries. A vignette may describe a child with rapid-onset bloody nasal discharge and dark discoloration of the nasal septum. Students who do not recognize the urgency of a disc battery may choose "observation and outpatient follow-up," which is incorrect. Button batteries demand emergent removal, and the question tests your ability to distinguish a caustic, time-sensitive foreign body from a benign one.
A third common error is selecting "CT scan" as the first diagnostic step. CT is not indicated as the initial test for a straightforward nasal foreign body. The best initial step is anterior rhinoscopy (physical examination). CT is reserved for complications, failed visualization, or suspected rhinolith. Test writers frequently include CT as a distractor to see if students default to imaging before performing a focused physical exam.
Finally, remember the "second foreign body" rule. After removing one nasal foreign body, always check the opposite nasal cavity and both ears. Children who insert objects into one body orifice commonly insert objects into others. A question may describe a child whose symptoms persist after removal of a foreign body from the right naris, and the correct next step is to examine the left naris and both ears, not to order imaging or prescribe antibiotics.