It surely is very unpleasant to hunger after a certain food and to resent it at the same time because you anticipate the disagreeable effects it will have on you.
Food and Drink sensitivity
The way you get allergic reaction is when a specific enzymes in the product you are having can not tolerate some chemical or natural substance of it.
The main symptoms are: gas, constipation, diarrhea, IBS, skin rash, headaches, and cough.
From another point of view, allergy is an immune response to some allergens, or food proteins that generate the allergy, and has a partially different symptomatology: soft tissues (tongue, lips, eyelids, etc.) swelling lesions itches vomiting culminating anaphylactic shock.
Most common Food generating allergies include milk, eggs, seafood, shellfish, peanuts, tree nuts, soy, and wheat.
Now there is a easy way to regain the possibility of using food and drinks banned for long time from your diet.