Thanks for the advice guys, he has had his first vaccination and is due his second one this week which is rather late on for a pup but we didnt get him till he was nearly 11 weeks old.
I am used to long haired dogs mostly and so the staffy is a bit of a new one on me but i have read that they can seem to suffer with skin problems. I guess its just a bit of trial and error at first to find out whats causing it. The cream we got from the vets was very expensive and the savlon spray sounds like a good suggestion, we shall see what the vet says this week and take it from there.