Your baby has had a high fever for three days with no obvious cause. Then, just as the fever breaks and you start to relax, pink spots appear across their tummy and back. That classic pattern is roseola. Roseola in babies is a common viral illness, usually between 6 months and 2 years, and most babies recover fully within a week. Here is what to expect and when to get help.
Quick answer: roseola in babies
- Cause: human herpesvirus 6 or 7; very common.
- Typical pattern: 3 to 5 days of high fever, then a pink rash as the fever goes.
- The rash starts on the body, is not itchy, and fades within 1 to 2 days.
- Treatment: rest, fluids and fever relief if your baby is uncomfortable.
Symptoms
- sudden high fever, often 39°C or higher
- irritability, tiredness and poor appetite
- runny nose, mild cough, swollen glands or sore throat
- a pink, flat or slightly raised rash on the chest, tummy and back once the fever drops
Caring for your baby at home
- Offer frequent feeds to prevent dehydration.
- Dress your baby lightly and keep the room comfortably cool.
- Use paracetamol (acetaminophen), or ibuprofen from 6 months, if your baby is uncomfortable. See acetaminophen vs ibuprofen.
- Let your baby rest. The rash needs no treatment.
Febrile seizures
A fast-rising fever can sometimes trigger a febrile seizure (fit) in young children. It is frightening but usually brief and harmless. Lay your baby on their side on a safe surface, do not put anything in their mouth, and time the seizure. Call emergency services if it is their first seizure, lasts more than 5 minutes or your baby does not recover quickly.
Is roseola contagious?
Yes, mainly during the fever phase, before the rash appears. Once the rash shows and your baby feels better, they are unlikely to be infectious. Wash hands often.
See baby fever: when to worry and baby rashes.
When to talk to your doctor
- any fever of 38°C (100.4°F) or higher in a baby under 3 months
- fever lasting more than 5 days, or a baby who seems very unwell
- a seizure, or a rash that does not fade under a glass: seek emergency help
- fewer wet nappies or refusing feeds
- a weakened immune system
Frequently asked questions
Can my baby get roseola twice?
It is uncommon, as most children develop immunity after one infection.
Should my baby stay home?
Keep them home while they have a fever. They can return once fever-free and feeling better.
Is the rash itchy?
Usually not.
Sources
- NHS: Roseola
- American Academy of Pediatrics, HealthyChildren.org: Roseola
- NICE: Fever in under 5s
This guide is general information, not medical advice. If your baby is unwell, contact your doctor.