Herpangina in Babies & Children
Content reviewed against published AAP, CDC, NIH guidelines
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Herpangina is a common viral illness in children caused by enteroviruses, most often Coxsackievirus Group A. It causes sudden high fever and painful blister-like ulcers in the back of the throat and soft palate. Unlike hand-foot-and-mouth disease (which is caused by related viruses), herpangina lesions are confined to the mouth and throat. It is most common in summer and fall and peaks in children aged 3-10 years.
Key takeaways
- Herpangina is a common viral illness in children caused by enteroviruses, most often Coxsackievirus Group A.
- Duration: Fever typically lasts 2-4 days. Throat ulcers heal in 5-7 days. Complete recovery usually within 7-10 days. Children feel worst during the first 2-3 days.
- Go to ER if: Signs of significant dehydration (no tears, sunken eyes, no urine for 8+ hours)
- No vaccine currently available
Symptoms
How It Presents by Age
0-6 months
Less common due to maternal antibodies. May present with high fever, feeding refusal, and irritability. Throat ulcers may be missed without careful examination.
Risk level: Low to moderate
6 months-3 years
High fever (often very high), drooling, food and liquid refusal. May have febrile seizure from rapid temperature rise. Dehydration risk from refusal to drink.
Risk level: Moderate — dehydration risk
3-10 years
Peak age group. Sudden fever with sore throat. Can point to throat pain. Visible small grayish-white ulcers on red base in posterior pharynx. Often occurs in summer outbreaks.
Risk level: Low to moderate
10+ years
Less common. Similar presentation but often less severe. Can describe symptoms clearly.
Risk level: Low
Treatment
Pain management
Acetaminophen or ibuprofen (6+ months) for fever and throat pain. Give pain medication before meals to facilitate eating and drinking.
Hydration
Maintaining fluid intake is the priority. Offer cold liquids, popsicles, and ice chips. Small frequent sips rather than large volumes.
Topical analgesia
Oral numbing sprays or solutions (avoid benzocaine in children under 2). "Magic mouthwash" combinations for older children who can swish and spit.
Supportive care
No antiviral treatment is available. The illness is self-limiting. Focus on comfort, hydration, and fever management.
Home Care
- Offer cold popsicles, ice chips, and cold milk/water
- Avoid citrus, salty, spicy, or hot foods that irritate ulcers
- Give soft, cold foods (ice cream, yogurt, smoothies)
- Administer pain medication 20-30 minutes before feeding
- Use a syringe to deliver small amounts of fluid if child refuses cup
- Monitor wet diapers to track hydration (minimum 3-4 in 24 hours)
- Keep child comfortable and rested
- Honey in cool water for children over 1 year
When to Worry
Go to the ER if:
- Signs of significant dehydration (no tears, sunken eyes, no urine for 8+ hours)
- Febrile seizure
- Extreme lethargy or difficulty waking the child
- Stiff neck with high fever
- Difficulty breathing
- Infant under 2 months with fever over 100.4°F
Call your doctor if:
- Suspected herpangina with very high fever (104°F+)
- Child refusing all liquids for more than several hours
- Fever lasting more than 4-5 days
- Signs of mild dehydration (dry lips, decreased urination)
- Young infant (under 3 months) with fever
- Painful mouth ulcers with inability to eat
Keep an eye on:
- Unable to drink any fluids for more than 12 hours
- Fewer than 3 wet diapers in 24 hours
- Fever lasting more than 5 days
- Lesions spreading outside the mouth
- Extreme lethargy or listlessness
- Febrile seizure
Prevention
- Frequent handwashing with soap, especially after diaper changes
- Disinfect frequently touched surfaces and toys
- Keep infected children home from childcare during acute illness
- Avoid sharing cups, utensils, and pacifiers
- Proper disposal of tissues and diapers
- Teach children to cover coughs and sneezes
Contagion & Incubation
Incubation
3-6 days after exposure
Contagious for
Most contagious during the first 1-2 weeks. Virus can be shed in stool for 4-6 weeks after infection, even after symptoms resolve.
Duration
Fever typically lasts 2-4 days. Throat ulcers heal in 5-7 days. Complete recovery usually within 7-10 days. Children feel worst during the first 2-3 days.
Frequently asked questions
How long does herpangina last?
How does herpangina (coxsackievirus pharyngitis) spread?
When should I take my baby to the ER?
Can herpangina (coxsackievirus pharyngitis) 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
Herpangina is a viral illness that typically resolves on its own. Seek emergency care if signs of significant dehydration (no tears, sunken eyes, no urine for 8+ hours).
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.