DH and I gradually noticed over a year ago that DD(10) was checking sell/use-by dates on food and asking about how long food had been in the freezer, if it had been cooked properly etc. We slowly realised that she was claiming not to be hungry if she had any doubts about how fresh something was (she has never had a big appetite and it isn't uncommon for her to occasionally eat very little at meals, so it took a while to spot the connection). Around this time we checked her search history on her tablet and found she had been searching "fear of being sick" - this was probably about six months ago.
We didn't want to make a big deal of it, so we have been keeping a quiet eye on things and reassuring her about use-by dates when asked (we would normally play pretty fast and loose with dates on food, relying on our own judgement, but have been more careful for her sake). All very manageable and it hasn't impacted her life in any way e.g. she has no issues eating at school, at friends' houses etc. We never discussed with her the worry about being sick - she doesn't know we knew about that.
However we've just been away for the weekend camping and we noticed that she wouldn't eat barbequed sausages etc and was worried about the water coming out of the rather rustic looking tap. Then this morning she got upset, said she was feeling sick and finally "confessed" that she has a phobia of vomiting. I asked if she thought it was emetophobia and she nodded hard - she clearly knew what the term meant.
She isn't an especially anxious child in any other respect (although she is scared of spiders and bees/wasps) and she hasn't actually been sick herself for years - I can't even remember the last time - so I'm not sure what has caused it. She has mentioned once of twice when children have been sick at school with an almost gory relish, so I think it only relates to her being sick herself, not other people.
So, I'm now wondering what, if anything, we should do to help her. I'm wondering if we have done the right thing about reassuring her about use-by dates, perhaps that is feeding her fear? We are very low key and relaxed though and definitely not an anxious family in general. I've seen threads on here about how challenging emetophobia can be for adults and so I'd really like to do whatever I can do try and address it before it gets worse. It would be wonderful to have some insight from people who share this phobia about what would have helped them as children.