Hi about a year ago I had shingles on my chest and arms, it went away but now i have a rash in the groin area, it seems to be spreading. i walk a lot and the rash itches so bad. also on one arm it seems to be a spot like i had with shingles. My question is does shingles show up in groin area? I takw a lot of vit c and d can a over dose of vitamins bring on a rash?