Numerous things can cause a runny nose or rashes to suddenly appear on the skin but determining if these conditions are the result of an allergic reaction requires a professional diagnosis. Amongst the most common and successful methods used to test for allergies are skin tests. Allergy testing procedures inject or scratch a small quantity of the potential allergen, such as pollen extract, solution containing animal dander proteins and others under the skin.

Stings from bees or wasps and bites from certain spiders are not the most pleasant thing to happen to anybody. However, for some folks, the discomfort goes beyond the moderate pain that dissipates in a few hours. Insect bites and stings are toxic for everybody but they can also cause much more serious reactions in those that are allergic to the venom. It has been officially estimated that around two million people in the U.S. alone suffer from insect venom allergies.