Roseola is a very common illness that affects babies and young children. It is caused by two strains of the herpes virus (6 and 7). There is a full range of signs and symptoms affecting children to varying degrees but for the majority, it isn’t usually serious and most people get it only once.
Adults can become infected with the disease if they have never been exposed to it as a child but unlike the chickenpox infection, it is usually milder in healthy adults.
Most people have mild symptoms of roseola and some even have no symptoms at all. After being exposed to the virus, it takes about two weeks for symptoms to appear in that individual.
Roseola can start with a high fever (usually greater than 39 degrees) that typically lasts 3-5 days. Accompanying the fever may be viral symptoms such as runny nose, cough, sore throat, or raised lymph glands in the neck. There may also be other non-specific symptoms like:
In some cases, once the fever has gone down a rash can appear. These are typically small, fine, flat spots. The rash begins on the middle of the body - chest, back, and tummy area and spreads towards the arms and the neck. The rash doesn’t cause any symptoms but can last for a few days.
The fevers in roseola can be very high (over 39 degrees) and this can lead some children to have febrile seizures. If this occurs it is important to seek immediate medical care. When temperatures are very high, it is important to speak to your doctor for further advice. If symptoms are not improving after a few days or there is any sign your child is getting worse, not better then you should seek prompt medical advice.
Yes, similar to other viral illnesses, roseola can pass from person to person through contact with an infected person's secretions. It is infectious early on in the course of illness, so even before there is confirmation of roseola (for example, by the rash appearing), it is possible to pass this on to other children. Once the high temperature has passed, your child can return to nursery if they feel well enough to attend.
There is no specific treatment for roseola.
Most people recover from the infection within a week of the fever beginning, so you just need to allow it to run its course. If your child has a very high fever it is important to speak to your doctor right away. A fever can be managed with paracetamol or ibuprofen (Calpol or Nurofen for children). It is important that your child has plenty of rest and drinks plenty of clear fluids to prevent dehydration. To aid with hydration, you can give rehydration salts.
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