When symptoms like a runny nose, constant sneezing and coughing, or itchy body rashes are making your life miserable, it usually means you are suffering from an allergy. Your body exhibits symptoms of allergy when it is trying to fight external allergens. Of the several factors that result in allergies, the most common ones are food products like soy, milk, dairy products, peanuts etc, external atmospheric factors like smoke, dust or pollution or other kinds of substances like cat fur, pollen ...