Hi, my 5yr old suddenly came out in a rash on Saturday, it's all up her arms and a bit on her legs, it's like a measles rash with lots of raised spots. I straight away thought heat rash, we came home and I covered her in calomine lotion. 2 days later she still has the rash and now it's all over her face, she does get very hot so she sleeps Infront of a fan all night. She is absolutely fine in herself, is it unusual for a heat rash to hang around this long?, wondering weather to take her docs tomorrow but don't want to waste thier time for just a heat rash