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Herpangina

Also called: Herpangina

A virus in young children causing sudden fever and painful blisters at the back of the mouth. It clears in a week.

CauseCoxsackie viruses
Clears7 days
KeyKeep child drinking

Overview

It's related to hand, foot, and mouth disease.

Symptoms

Common signs:

  • Mouth blisters with fever
  • Mouth sores

Less common

  • Sore throat
  • Drooling

When to get medical care

Call 911Stiff neck, seizure, or very hard to wake.
Get care todayNot drinking or few wet diapers.
See a doctor soonFever over 3 days.

Causes

Virus.

Does it spread or run in families?

  • Yes, it can spread from person to person.
  • How it spreads: coughs, sneezes, saliva, blister fluid, or stool.
  • Washing hands often and staying home when sick help protect others.

Who is more likely to get it

  • Children under 10

Possible complications

Diagnosis

Diagnosis by looking.

Treatment

Comfort care.

Self-care

  • Cold drinks and popsicles
  • Soft, bland foods
  • Wash hands

Medicines

Medicines that may help:

MedicineHelps withGood to know
Pain and fever relievers
Pain and feverNo ibuprofen under 6 months; dose by weight.

OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.

Prevention

  • Handwashing

Which doctor treats this

  • Start with your child's pediatrician.

Back to school, work, or sports

  • Keep your child home until they've had no fever for 24 hours without fever medicine and feel better.
  • For the next few days, wash hands often and teach them to cough into an elbow.

Children, pregnancy, and older adults

  • Children under 10: Most common.

For caregivers

  • Learn the warning signs and when to call the doctor or 911.
  • Keep a list of your child's medicines, doses, and doctors on your phone.
  • Tell teachers, coaches, and sitters what to watch for and what to do.
  • Take breaks and ask for help. Caregivers need care too.

Outlook

Clears.

Getting ready for your visit

Bring a list of your symptoms and medicines.

Questions to ask

  • When can my child return to daycare?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Herpangina

Sources

Last updated 2026-11-12.