Any idea what this rash might be?

Saturday I noticed my daughter had a splotchy rash covering her right arm and leg. I looked at the left leg and saw a small spot that started spreading in front of my eyes. It didn’t hurt or itch. She had been in the sun for about an hour on & off. She was not wearing sunscreen, so no reaction to ingredients, and she has never had that type of reaction from just being in the sun before.

Anyway, the entire thing was gone by Sunday.

Last night I saw a fingerprint size red splotch on one cheek. This morning, both cheeks are bright splotchy pink. It doesn’t hurt or itch.

I thought fifths disease, but it doesn’t really fit since the cheeks usually happen first. Then again, the two may not be related and another rash may pop up to indicate fifths.

She has no fever or other symptoms and is acting fine. I don’t think a trip to the doctor is necessary. I’m not worried – just curious.