Sun Poisoning questions?

I caught lyme's disease about 3 weeks ago (I'm off the medication as of sunday) and the medication I took said to stay out of the sun. During field day, my hands started to tingle so I went back inside. The tingling went away, but I was severely burned all over arms,face, and especially my hands and knuckles. The burns were so severe on my hands and knuckles that they're still here, although they have been enhanced with further exposure to the sun. They are now very itchy and I have small bumps in patches on my right hand below my 3rd index finger knuckle. I have scratched myself raw in 2 places on my fingers, but they are healing. Please give me some insight on this problem.