Thanks for your replys ladies. It went away within about 1 - 1.5 hours. Poor little man. And it was just the rash. He was he usual self with loads of energy and was still very happy

Heather thats a great idea about the photo. I will definately do that if it happens again.

Boomba- nope haven't changed the washing powder. If you come over today you can give him lots of cuddles to make it better