Before bed today, DS1 (4) was scratching his thighs quite madly. We found a small weltlike sort of spot, almost like an alergic reaction, on the top of one thigh.
He seems generally ok. No new washing powder etc. He did have startling amounts of e-numbery food this afternoon (birthday party).
I'm not very worried, but I'm a bit perturbed. Any ideas what this could be?