Is Roseola Contagious?

  • Medical Author:
    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

  • Medical Editor: Melissa Conrad Stöppler, MD
    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

Child with roseola

Early Roseola Sign and Symptoms

The signs and symptoms of HHV-6 (or HHV-7) infection vary depending upon the age of the patient. Infants and toddlers routinely develop sudden symptoms with an abrupt onset of a high fever (103-104 degrees) that lasts for three to five days. The child may also develop irritability, swollen glands in the front or back of the neck, runny nose, puffy eyelids, and mild diarrhea. Within 12-24 hours of the fever breaking, a rash rapidly appears. Older children who develop HHV-6 (or HHV-7) infection are more likely to have an illness characterized by several days of high fever and possibly a runny nose and/or diarrhea.

What is roseola?

Roseola (also termed sixth disease, roseola infantum, and exanthema subitum) is a common viral infection that occurs mainly in children between 6-24 months of age. The virus that causes roseola is usually relatively benign, because about two-thirds of children infected have no symptoms. When symptoms do occur, roseola begins with a high fever (102 F-105 F) that breaks in about three to seven days. When the fever breaks, a reddish or pinkish rash characteristic of roseola occurs all over the body (starting on the trunk and spreading to the arms, legs, and face) and lasts from a few hours to a few days. There is no specific treatment for roseola; however, the fever can be reduced with acetaminophen (Tylenol) and cool sponge baths.

Is roseola contagious? What is the incubation period for roseola?

Roseola is contagious. It has an incubation period (from time of exposure to the virus to symptom development) from about five to 14 days. The individual remains contagious until one or two days after the fever subsides. The roseola rash may still be present, but the child or individual is usually not contagious after the fever abates. Roseola is caused by a common virus (belonging to the family of herpesviruses and termed HHV-6). This virus does not cause cold sores or genital infections. Most pregnant females (about 96%) are immune to HHV-6 so there are only rare reports of a mother contracting roseola and transferring the virus to the fetus, in which HHV-6 may cause problems like miscarriage or birth defects.

How will I know if someone or my child has roseola?

If someone has roseola, usually they become infected from other individuals (for example, the children in a day-care center or siblings). The key to diagnosis of roseola is that when the fever stops, a non-itchy rash develops all over the body. The person, usually a child, has a decrease in appetite, mild diarrhea, or slight cough with runny nose but otherwise seems to be acting normal. This is not unusual for a child with roseola. However, if a child develops a high fever (102 F-105 F) and the fever does not go down, the child may develop more severe symptoms. Most individuals visit their physician/pediatrician to rule out other potential problems that may produce similar but more severe symptoms (for example, meningitis).

Medically Reviewed by a Doctor on 10/26/2016

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