Roseola is a common viral illness in babies and toddlers (usually 6–24 months). It typically causes a sudden high fever for a few days, followed by a pink rash once the fever breaks. Most children recover quickly.
What causes it
- Usually human herpesvirus 6 (HHV-6), sometimes HHV-7.
- Spread through saliva and close contact. Many adults have had it as children.
Typical pattern
- High fever (often 39–40.5°C / 102–105°F) for 3–5 days. Child may seem otherwise fairly okay, or a bit cranky.
- Fever drops suddenly, and then a pink, fine, flat rash appears—mostly on the trunk and neck, spreading to the face and arms.
- Rash is not itchy and fades in 1–2 days.
When to seek care
- Any infant under 3 months with fever.
- Very high fever, trouble breathing, poor drinking, signs of dehydration (no tears, dry mouth, few wet diapers).
- If a seizure occurs with fever (febrile seizure). These usually stop on their own within a few minutes, but call your clinician or emergency services per local guidance.
Treatment at home
- Fluids and rest.
- Fever control with acetaminophen or ibuprofen (ask your pediatrician for dosing; avoid ibuprofen under 6 months and avoid aspirin).
- Light clothing and lukewarm sponging if helpful.
What to expect
- Most kids recover fully within a week.
- The rash means the contagious period is usually ending.