Seafood allergy is most common where seafood is an important part of the diet. The allergy occurs as a bodily response to a particular type of food, resulting in various symptoms like swelling, vomiting, diarrhoea, trouble breathing, low blood pressure, swelling, itching of tongue etc. It’s not rare but having allergy of this kind can result to abnormal body functions. Skin test and Blood test are performed to know the exact nature of allergy and how they should be cured. Type of allergy may differ from person to person but the tests remain the same. It reckons your intolerance to certain types of food.