True coffee or cocoa allergy is rare. More commonly, reactions to coffee are the result of a food intolerance or allergy to an ingredient in it. Coffee contains .3 grams of protein per eight ounce cup. When such an allergy occurs,it may cause hives,swelling,itching,hoarseness of voice and difficulty in breathing and life threatening anaphylaxis.
Fainting just with the smell of coffee is rare.Do you have any of the symptoms which I have mentined above with the consumption of coffee?It can be a food allergy then.
In my opinion if fainting due to smell of coffee occure,then get it evaluated from an allergist.Skin and blood tests can be used to confirm whether the syncopal attcake are a manifestation of coffee allergy or not.
Hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.Kind regards.
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