Hi Lissy, I have had bad allergies all my life. I had my allergy test when I was 8, I am 17 now, it was pre-POTS but I don't think the POTS will change it much. They prick your skin with something that has the essence of the allergen on it if the skiing reacts you are allergic to the allergen. I'm not going to sugar coat it the test is quite painful and VERY itchy but well worth it. Hope all goes well. Meaghan