ask mamis

Este artigo é apenas informativo e não substitui consulta médica. Em caso de dúvida, entre em contato com seu pediatra ou parteira.

🌡️

Roseola (Three-Day Fever)

Roseola follows a classic pattern that almost every child goes through once: 3-4 days of high fever — and then, when the fever suddenly drops, a red rash appears. Only then is the diagnosis clear. Roseola is harmless, but the high fever can be very unsettling for parents.

Possíveis Causas

  • 1Human herpesvirus 6 (HHV-6) — most common pathogen (about 90%)
  • 2Human herpesvirus 7 (HHV-7) — rarer, similar course
  • 3Transmission via droplet infection (saliva, sneezing)
  • 4Incubation period 5-15 days
  • 5One-time infection — lifelong immunity afterwards

O Que Você Pode Fazer

  • Reduce fever: paracetamol or ibuprofen (age-appropriate) — dose by weight
  • Plenty of fluids: breastfeed more often, offer water or diluted teas
  • Light clothing and cool room (18-20°C)
  • Cool compresses only from 39°C and only when extremities are warm
  • Lots of body contact and comfort — your baby needs you especially now

Quando Ir ao Médico?

  • Febrile seizure: twitching, fixed gaze, loss of consciousness → place child safely, do NOT restrain, call 911/112
  • Fever above 40.5°C not responding to medication
  • Baby under 3 months with high fever → ALWAYS see doctor immediately
  • Child stops drinking and shows signs of dehydration
  • Rash is very itchy or blistering (then it's probably NOT roseola)

Notas por Faixa Etária

Most common between 6 months and 2 years (peak around 9-12 months). Before 6 months rare (maternal antibody protection). By age 3, over 95% of all children have had the infection. Adults are almost always immune. Roseola is the most common cause of febrile seizures in toddlers — so monitor temperature closely.

Perguntas Frequentes

How do I recognise roseola?
The typical pattern: FIRST 3-4 days of high fever (often 39-40°C) with no other clear symptoms. The child is surprisingly well for such a high fever. THEN the fever drops suddenly and a pale red, non-itchy rash appears (trunk, face, arms). The rash disappears after 1-3 days.
Is the rash contagious?
No! When the rash appears, the contagious phase is OVER. The child is most contagious during the fever phase, before you even know what it is. That's the tricky part about roseola.
Should I worry about febrile seizures?
Febrile seizures occur in about 10-15% of children with roseola. They look terrifying but are usually HARMLESS and leave no lasting damage. During a seizure: place the child safely on their side, put nothing in their mouth, time the duration, call an ambulance. Always get medical evaluation afterwards.

Guias Relacionados

🤱

Breastfeeding Guide

Latching, clogged ducts, pumping & weaning

Ver todos os guias
👩‍⚕️
Premium

Acesso a Especialistas

Pergunte a uma parteira ou pediatra — direta e pessoalmente.

Ver planos

Dicas semanais para você

Informações personalizadas para sua fase — grátis, sem spam.

🏥

Todos os Sintomas

Saúde do Bebê A-Z

👶

Desenvolvimento do Bebê

Mês 1-24

Pergunta sobre Roseola (Three-Day Fever)?

Nossa IA responde instantaneamente — com empatia e evidência.

Este artigo é apenas informativo. Não substitui aconselhamento médico individual. Se tiver preocupações, entre em contato com seu pediatra, parteira ou ligue para a emergência.