Allergies can make life uncomfortable, to say the least. When your allergies flare up, you may have itchy eyes and snot coming from your nose, and your skin may even erupt into hives. All of this can bring high levels of discomfort. It can be especially worrisome when you don't know the exact cause of your allergy. Having an allergy test done can clear up any confusion you may have. Here's a look at what you can expect if you decide to go ahead and do this test.