Mystery hives & stomach ache at school
Oh dear, he's at that age, isn't he? Too old to continuously monitor, yet not old enough to totally trust his judgement.
Remind him the symptoms for a reaction. This is a good opportunity to go over his allergy action plan.
Strawberries are naturally high in histamine and can cause hives, even if not allergic. But the stomachache is a *definite* symptom.
Perhaps this would be a good time to show him the last couple of entries in the "In Memory" thread...just to drive your point home a little more.