I have an itchy bump on my arm, The redness and heat around it is about 5 inches now and the main bump is probably about an inch wide. it is very warm and very uncomfortable, I try my best not to scratch it, but when i do, it stings really bad. It seems that there is one starting to form on my hip. I am worried I might be breaking out with shingles again, although I ve heard it rarely comes up twice.