A child may not have any symptoms for up to 15 days after getting the virus that causes roseola. When symptoms do appear, the first thing you’ll notice is a sudden, high fever (over 103 F) that lasts or can come and go for 3-7 days.
Other than the fever, your child might seem healthy. They may be restless or irritable. Once the fever goes away, she might also develop a raised, spotty, reddish rash, mainly on her neck and trunk. It doesn’t itch and may last just a few hours or a few days.
Your child might also have diarrhea, cough, and droopy or swollen eyelids.