food allergy/intolerance and asthma

hi all wondering if anyone can give me any advice my daughter is 14 and has bin asthmatic since the age of 5

she has had a bad year with her asthma but today she had a reaction to a packet of salt and vinegar crisps

a few years a go we stopped her having mint sauce cos she kept having attacks after having the sauce whilst eating her sunday lunch

today she said the crisps were strong,she only has this flavour once in a blue moon

now startingto wonder if the prob she has bin having at school is due to cleaning products

any advice from anyone greatly rec'd

karen