Roseola (roseola infantum)
Roseola frightens parents more than almost any other childhood infection, and the reason is the order in which things happen.
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Medicines commonly prescribed for Roseola (roseola infantum)
For informational purposes only. Always consult a doctor before using any medicine.
Dosage form: TABLET, 1000 mgActive substance: paracetamolManufacturer: Mylan Pharmaceuticals S.L.Prescription not requiredDosage form: EFFERVESCENT TABLET, 1000 mgActive substance: paracetamolManufacturer: Cipla EuropePrescription requiredDosage form: INJECTABLE PERFUSION, 10 mg/mlActive substance: paracetamolManufacturer: Laboratorios Basi Industria Farmaceutica S.A.Prescription required
Roseola frightens parents more than almost any other childhood infection, and the reason is the order in which things happen. First a child spikes a high temperature for no visible reason and keeps it for three days, with a clear throat, healthy ears and nothing that hurts — and nobody can say what it is. Then the temperature drops, everyone relaxes, and at that exact moment the child comes out in a rash. That is usually where the panic starts. In fact it is the other way round: the rash of roseola is the sign that the illness is over.
The sequence that gives it away
Roseola is caused by human herpesvirus 6. Nearly all adults carry it, and nearly every child meets it in the first couple of years of life, most often between six months and two years. Many go through that encounter with no rash at all, which is why some families only find out what roseola is when the second child gets it.
The classic picture runs like this:
- the temperature rises suddenly and goes high, often in the evening, and stays for about three days, sometimes up to five;
- there is almost nothing else: the throat is not red, there is no cough or only a slight one, the tummy is fine. Sometimes there are slightly puffy eyelids, enlarged glands in the neck and behind the ears, and looser stools;
- between the peaks of fever the child is often surprisingly cheerful, playing and taking an interest in things;
- the temperature settles, usually quickly, over a few hours;
- and only after that, within a day, the rash appears.
That sequence is the giveaway. If the rash came out not after the temperature settled but at the height of it, and the child is unwell with it, this is not the roseola pattern and it needs looking at separately.
What the rash looks like
Pink or reddish spots and small raised bumps, a few millimetres across, sometimes with a paler ring around them. They start on the chest, tummy and back, then move to the neck, face and arms; the legs are involved less often. On brown and black skin they are harder to see — daylight and a sideways look help.
The rash does not itch, does not hurt, does not weep and leaves no mark. By this stage the child usually feels well. Within a day or two it fades and goes on its own. Nothing needs to be put on it: no cream will speed up something that is already leaving.
The rash that does not fade
There is one feature worth remembering above everything else. The roseola rash fades when you press on it. Press the skin with a finger or with the side of a clear glass: the spots vanish for a moment and come back when you let go.
The rash of meningococcal infection behaves differently — it does not fade. It looks like tiny red or purple pinpricks, or like small bruises that came from no knock. It appears on a child who is visibly unwell: listless, refusing drinks, with cold hands and feet despite a high temperature, moaning or crying in an unfamiliar way.
But the glass test deserves an honest warning: it cannot be relied on by itself. There are reasons. Early on, a dangerous rash may still fade. On dark skin it is hard to see, and you have to look where the skin is paler — palms, soles, tummy, and also inside the eyelids and on the roof of the mouth. Sometimes serious infection runs with no rash at all. And the reverse happens too: spots can fail to fade for entirely harmless reasons, such as those that appear on the face and neck after hard vomiting or coughing.
So the rule is this: a rash that does not fade means calling an ambulance straight away, and a rash that does fade in a child who is unwell is still a reason to call. The child is judged as a whole, not by the glass.
Febrile convulsions
In roseola the temperature climbs fast, and it is on that climb that young children can have a convulsion brought on by the heat. Roseola is one of the common causes, so it is better to know about this in advance than to find out in the moment.
It looks like this: the child loses consciousness, the body stiffens, the arms and legs jerk, the eyes roll upwards, the lips may turn blue. It usually lasts from a few seconds to a couple of minutes and stops by itself. Afterwards the child is sleepy and dazed, and that is normal.
What to do:
- lay the child on their side on something soft and move hard objects out of the way;
- note the time — that is the first thing a doctor will ask about;
- do not hold the child down or prise the teeth apart, do not put anything in the mouth, do not give drinks and do not try to get paracetamol in;
- once it is over, leave the child lying on their side.
Call an ambulance if this is the first time it has happened, if it lasts longer than five minutes, if it repeats, if the child has trouble breathing, or if they do not come round properly once it has finished.
And one thing worth hearing separately: these convulsions look terrifying, but they do not damage the brain and they do not mean epilepsy. They cannot be prevented with fever medicines — those are given for comfort, not to head off a convulsion.
What helps at home
Roseola has no specific treatment and needs none: antibiotics do nothing against a virus. The task is to get through three days of fever.
- Drinks little and often. A high temperature loses a lot of fluid, and a child rarely wants to drink a whole cup at once.
- Lighter clothes, cooler room. Do not wrap a feverish child up: the heat has to get out.
- Fever medicine is not given for the number on the thermometer but when the temperature is making the child miserable. Children's paracetamol and children's ibuprofen both suit; the dose is worked out by weight rather than age, and taken from the label or from a doctor.
- In the very youngest, fever medicine is given only on a doctor's advice — there are separate limits by age and weight.
- Do not alternate or combine two medicines on your own initiative: that is how doses go wrong. A regime of that kind is something a doctor prescribes.
- Aspirin is not given to children and adolescents.
- Sponging with cold water or with alcohol does not help and makes the child feel worse.
Is it catching, and when can they go back to nursery
The virus spreads in saliva and in droplets from breathing and talking, usually from adults and older children who have long been well and are simply carrying it. That is why the source can almost never be traced.
A child is most infectious on the days of high temperature, that is, before any rash exists. By the time the rash appears the most infectious stretch is behind them — the roseola rash is not the thing other people need to be afraid of.
Hence the practical answer. The child stays at home while the temperature lasts. After that, if they are lively and feeling well, they can go back to nursery: there is no need to wait for the rash to clear. It is worth telling the nursery staff this too, because a child with a rash is sometimes turned away at the door.
When to call an ambulance
Call an ambulance (in Europe, the single number 112) if a child develops:
- a rash that does not fade under pressure;
- blue, grey, pale or blotchy skin, lips or tongue; on dark skin this shows up better on the palms and soles;
- laboured breathing — grunting, the skin sucking in under the ribs, very fast breathing, pauses;
- a weak, unusually high-pitched cry, unlike their normal one;
- not responding as usual, not reacting, being hard to wake, or refusing to drink;
- a convulsion — a first one, one lasting over five minutes, or repeated ones;
- a stiff neck, a bulging soft spot on the head, turning away from bright light.
Do not drive to hospital yourself: ask someone to take you or call an ambulance.
A doctor is needed the same day if the child is under three months old and has a temperature, because at that age any fever needs examining. The same applies if the temperature lasts more than five days or comes back after it had settled; if the child is passing much less urine than usual, has a dry mouth and cries without tears; if the rash appeared during the high temperature rather than after it, or lasts more than three days; and simply if you are worried and the child does not seem themselves. A parent's sense that something is wrong is a serious argument, not a superstition.
Online consultation
Remotely it is easy to sort out exactly what worries people most: what this rash looks like, whether it fits the roseola picture and whether anything further needs investigating. A doctor will lay out the order in which events happened, explain which signs call for an ambulance and which can safely be watched at home, and help work out the dose of fever medicine for your child's weight. It is also a way of getting an answer when the rash comes out in the evening and waiting until morning feels uneasy. The signs in the list above are not assessed remotely — with those, call an ambulance straight away.
This material is for information only and does not replace medical advice.
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