Roseola is an infection caused by a virus. It is characterized by a sudden onset of high fever followed by a rash. The infection usually ends on its own without complications.
Roseola is usually caused by a virus called human herpesvirus 6 (HHV-6). It can also be caused by human herpesvirus 7 (HHV-7). These viruses are not the same as the herpes viruses that cause cold sores or genital herpes.
Factors that increase the chance of roseola include:
- Age: 6 months to 3 years; most common between 6 months and 15 months
- Contact with an infected child is rarely reported
- Season: Most common in the Spring and Fall
Symptoms of roseola include:
- 103°F to 105°F
- Begins suddenly and is not associated with other symptoms
- Lasts 3 days, sometimes a day or two longer
- Convulsions may occur in association with high fever in up to 5% to 10% of children
A rash that develops 12-24 hours after the fever
- Appears on the chest and abdomen first
- May spread to arms, legs, neck, and face
- Lasts for a few hours to a few days and does not itch
Other symptoms or signs may include:
- Swelling of lymph nodes in the neck and behind the ears
- Poor appetite
- Upper respiratory tract infection symptoms that may occur before the fever
The appearance of a rash after the fever disappears is the characteristic sign of roseola.
The doctor will ask about symptoms and medical history. A physical exam will be done. Usually other tests are not needed. Often, there is a history of other children with roseola in the community.
No treatment is needed for roseola unless the child has a weakened immune system. The most important treatment is to keep the fever down and drink plenty of fluids.
Talk to your doctor about how to bring the fever down through:
- Medications such as acetaminophen or ibuprofen
- Lukewarm sponge baths
- Plenty of fluids
- Note: Aspirin is not recommended for children or teens with a current or recent viral infection. This is because of the risk of Reye's syndrome. Ask your doctor which other medicines are safe for your child.
Call your doctor if your child has a seizure and/or the fever persists.
To help prevent the spread of roseola, avoid contact with an infected child when possible. The incubation period is 5-15 days. The virus is thought to be spread by contact with infected saliva. Carefully and frequently wash your hands to help prevent the spread of roseola.
- Reviewer: Michael Woods, MD
- Review Date: 08/2013 -
- Update Date: 05/11/2013 -