Laryngitis in Children
Content reviewed against published AAP, NIH, Mayo Clinic guidelines
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Laryngitis is inflammation of the larynx (voice box), causing hoarseness or loss of voice. In young children, it often presents as croup (laryngotracheobronchitis) with a characteristic barking cough and stridor. In older children, it more closely resembles adult laryngitis with hoarseness. Most cases are caused by viral infections (parainfluenza, RSV, adenovirus) and resolve without specific treatment.
Key takeaways
- Laryngitis is inflammation of the larynx (voice box), causing hoarseness or loss of voice.
- Duration: Croup in young children: barking cough lasts 2-3 days, with total illness lasting 7 days. Laryngitis in older children: hoarseness typically resolves in 1-2 weeks. Symptoms are usually worst on days 2-3.
- Go to ER if: Stridor at rest that is getting worse
- No vaccine currently available
Symptoms
How It Presents by Age
6 months-3 years
Usually presents as croup with barking "seal-like" cough, hoarse cry, and possibly stridor. Worse at night. Airway is smaller so more prone to significant obstruction.
Risk level: Moderate to high — airway risk
3-5 years
May still present as croup but less severe. Hoarse voice, barking cough, and runny nose. Night worsening is typical.
Risk level: Low to moderate
5-12 years
More classic laryngitis presentation with hoarseness, sore throat, and cough. Less likely to have significant stridor. Often follows a cold.
Risk level: Low
12+ years
Presents like adult laryngitis with hoarseness, voice loss, and throat discomfort. Usually self-limiting over 1-2 weeks.
Risk level: Low
Treatment
Cool mist or humid air
Exposure to cool night air or cool-mist humidifier can reduce laryngeal swelling. Though evidence is limited, many parents report improvement.
Corticosteroids
Single dose of dexamethasone (0.15-0.6 mg/kg) is first-line for croup. Reduces swelling and decreases return visits by 50%. Effective for even mild croup.
Nebulized epinephrine
For moderate-to-severe croup with significant stridor at rest. Provides rapid but temporary relief (1-2 hours). Requires observation for 3-4 hours for rebound symptoms.
Voice rest and supportive care
For older children with laryngitis: voice rest, hydration, and humidified air. Avoid whispering (which strains vocal cords more than soft speech).
Home Care
- Take the child outside into cool night air for croup episodes
- Use a cool-mist humidifier in the bedroom
- Keep the child calm — crying worsens stridor
- Offer warm clear fluids (for older children)
- Elevate the head of the bed slightly
- Run a hot shower and sit in the steamy bathroom (though evidence is limited)
- Encourage voice rest in older children — avoid yelling and whispering
- Honey (over 1 year old) in warm water for throat soothing
When to Worry
Go to the ER if:
- Stridor at rest that is getting worse
- Severe difficulty breathing or chest retractions
- Drooling with inability to swallow
- Blue or gray color around lips or fingernails
- Child is anxious, agitated, or unusually lethargic
- High fever (104°F+) with voice changes and drooling (rule out epiglottitis)
Call your doctor if:
- First episode of barking cough or croup
- Stridor that is persistent or recurring nightly
- Hoarseness lasting more than 2 weeks
- Fever lasting more than 5 days
- Recurrent croup episodes
- Difficulty swallowing with voice changes
Keep an eye on:
- Stridor at rest (not just when crying or active)
- Chest retractions or use of accessory muscles to breathe
- Increasing respiratory rate
- Drooling or inability to swallow (may suggest epiglottitis)
- Hoarseness lasting more than 2 weeks without improvement
Prevention
- Frequent handwashing
- Avoid contact with people who have respiratory infections
- Keep vaccinations up to date (influenza, COVID-19)
- Teach proper cough and sneeze etiquette
- Avoid irritants like smoke and strong fumes
- Adequate hydration to keep mucous membranes moist
Contagion & Incubation
Incubation
1-7 days depending on the virus (parainfluenza: 2-6 days, adenovirus: 2-14 days)
Contagious for
Most contagious during the first 2-3 days of illness when symptoms are worst. May shed virus for up to 1-2 weeks.
Duration
Croup in young children: barking cough lasts 2-3 days, with total illness lasting 7 days. Laryngitis in older children: hoarseness typically resolves in 1-2 weeks. Symptoms are usually worst on days 2-3.
Frequently asked questions
How long does laryngitis in children last?
How does acute laryngitis / laryngotracheitis spread?
When should I take my baby to the ER?
Can acute laryngitis / laryngotracheitis be prevented?
When can my child return to daycare?
Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources
Related Illnesses
Bottom line
Laryngitis in Children is a viral illness that typically resolves on its own. Seek emergency care if stridor at rest that is getting worse.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.