I Have Hives From Eating Raspberries That I'm Allergic To.

I have hives from eating raspberries that I'm allergic to. Usually goes away in a day or two it is now been 8 days and still behind my ear down my neck only on left side. The one behind my ears feel like they are inside my neck gland and tender to touch. I have been taking and allergy pill and rantindine. is it normal to hurt? and how long should they last? should I go to dr?benedryl didnt seem to do anything.