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Exanthema subitum
High fever, then a rash and the all-clear — typical and harmless in toddlers.
Also known as: roseola infantum · exanthem subitum
Open in the tool — with search and all the links →This compilation is for information and replaces neither medical diagnosis nor treatment. If you have symptoms, see a doctor.
Roseola is a very common, harmless viral illness of early childhood that almost every child goes through once. The course is characteristic: first a fairly high fever for about three days, often without the child seeming very ill otherwise. Just when the fever drops, a fine, pale-red rash appears especially on the trunk and neck — and this very appearance of the rash is the sign that the illness is already fading. The rash usually doesn’t itch and disappears again after one to two days. Treatment consists of rest, enough fluids and, if needed, fever-lowering measures. Because the high fever can rise quickly, it can trigger a febrile seizure in susceptible children (see that topic). See a doctor if the child seems very unwell, the fever lasts very long, or if you are unsure.
The body heals itself; drinking enough is the main thing.
If uncomfortable, proven fever-lowering measures help.
It usually doesn’t itch and clears on its own.
With a very unwell child, very long fever or uncertainty.
No drug attacks the virus. Fever reducers serve comfort, not the course, and they do not prevent febrile seizures. The pattern is what decides: three days of high fever with a surprisingly good general state, then the fever falls and only afterwards does the rash come. Seeing the rash means it is over — and that it was not an antibiotic rash, if one was given in between.
Almost all children go through it before their third birthday, usually between six and fifteen months. The fever rises to thirty-nine or forty degrees and lasts three to five days, with a surprisingly good general state. Only when the fever falls does the rash come — and it lasts hours to two days. About one in ten children has a febrile seizure with it; the virus then stays in the body for life without causing trouble.
A typical, benign viral illness of early childhood.
~3 days of fever; the rash comes as the fever drops.
Its appearance shows the illness is already fading.
The fast-rising fever can trigger a febrile seizure → see that topic.
Roseola itself needs no blood values. While the fever is there without a rash, CRP helps to rule out a bacterial infection.
Fever, sweating and faster breathing clearly raise the need. Drinking enough keeps the mucus thin and the circulation steady — in children and older people it is the most important point of all.
With low levels airway infections occur somewhat more often; correcting a deficiency makes sense, a high single dose during the infection does not act on it.
Needed by the defence cells. For lozenges at the start of a cold there are hints of a slightly shortened duration; at a high dose over months zinc lowers copper.
Antibodies and defence cells are protein. After several days with little appetite it is worth at least keeping the protein up — soup with egg, quark, yoghurt, lentils.
Clearly worthwhile and well studied when deficient; fewer data for the wider uses. Fat-soluble — check blood levels at high doses.
The pattern is the whole trick: three days of high fever with a child in surprisingly good shape, then the fever falls, and only afterwards the rash comes. Anyone who knows it recognises it in hindsight — beforehand almost nobody.
Fever-lowering medicines do not prevent the febrile seizure that can occur here. They make the child more comfortable — no more is to be expected from them, and more is often expected.
Three days of high fever, then the rash. Appetite often returns only with the rash — during the fever days only drinking enough matters.
Three days of high fever, then the rash — and with it appetite returns. During the fever days only the amount drunk counts.