I Swear I Must Be Part Vampire

I can't stay out in the Sun more than 10 minutes or so till I break out in hives.  It's not as bad as it used to be, but it is quite aggravating. When I was a kid, It looked totally horrible, and  I almost got sent to the Dr. a few times. No sun screen of any SPF seems t. help, it's like putting butter on something you're baking.