Really weird, appeared yesterday. It's really, really fine, like tiny dots which are all joined together into a big raised patch on his back and some on his torso. It's not that red, only pale pink and doesn't appear to be causing him any discomfort. I thought it was a heat rash but it's still there this evening. Absolutely fine in every other way - eating well, no fever, usual shouty self.
Should I just ignore it or take him to the GP? Or does anyone have any idea what it might be?