My niece just had an allergy test done and with the exception of dust mites, it came back negative. However, she can not eat anything with mustard or mustard seed in it with it causing her throat to swell up and the same seems to go for lactose, but since the allergy test was negative on those items, does that mean she is simply sensitive to those items but not fully allergic? Can someone explain the difference between the two?
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An allergy is where the immune system is involved and results in a histamine response. Histamine changes blood pressure, causes swelling, can result in hives and so on.
A food sensitivity is caused by the digestive system. This can result in vomiting, diarrhoea, bloating and so on.
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