What are the lumps/spots on DS1's back and front

[sameagain]

He's calling them gnat bites and that is exactly what they look like, but they can't be at this time of year can they?

He has about a dozen on his torso and they seem to be itching like gnat bites. No-one else has any and he's well in himself.

flea bites? have you got pets?

It sounds like hives. Have you changed the washing powder? Are they red?

No, no pets and haven't changed washing powder. They are a bit red, but then he's been scratching them.

Try giving him a spoon of piriton.