She may be celiac, rather than have an allergy. So increased exposure (more gluten and/or more often) would fit that pattern more than a gluten allergy, in my opinion, but this is not definitive.
It would definitely be worth getting her tested for celiac disease. Do this soon – some tests may not be valid if she has not been exposed to gluten for a while and it would be better to get the test due to expose in the recent past, instead of having to get her sick to be properly tested.
What if that muffin she had turned out to be gluten-free and the parents didn’t tell anyone (why should they?) Maybe you should ask.
I suggest you tell the school she is gluten-intolerant, no reason to wait. You can always take her off the list if you find out she’s not.
]]>You’re most welcome! It really makes my day when I see how much this site is helping people.
Have you cut out gluten and found that your symptoms disappeared, or is this something you are going to try?
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