Thanks. He had quite bad chicken pox a year ago; I know it can recur, but I don't think it's that (hopefully!).
We put on lots of Savlon after his bath last night as suggested by a post I found on an old thread here, and it seems to have helped, as the spots are much less angry-looking. I put it on again this morning. Cold sores looking like they are drying away, too (have been applying Zovirax).
So, hopefully a false alarm. Thanks again for replies though.
Thanks again for replies. I will take him in to let the gp have a quick look. Spots have faded back a lot today, and cold sores drying away, but if they aren't gone in the morning I will try to get an appt.
<yuck> @ ringworm, always think it sounds so horrid.