I made an appointment with an allergenist for next Thursday to get tested and see what I'm allergic to. What can I probably expect? How do they usually test for allergies?

The other question- About once every 2 days or so, I develop this flat red rash (sometimes two or 3 at once) on my neck that is about 2 inches across in size. Is this possibly an allergic reaction to something?

Thanks in advance.

They do a scratch test where they scratch your arm or back with various allergens to see how your skin reacts. From that they determine what you are allergic to and the severity. That also tells them how to make up your serum for the injections, should you decide to so that.

thank you titchou!!

how many allergens do they usually test for?