He had it on his face yesterday after school, didn't seem to be bothering him and it was gone this morning. School phoned me just now, it has come back and spread to his neck. Still not itchy and he doesn't seem unwell. He's had all his nhs immunisations and he's already had chicken pox. It looks like an allergy/eczema but wouldn't that be itchy? I asked the school to keep an eye on it and ring if it gets worse but now I'm not sure if I did the right thing.