I have a rash on my arm right where you bend it, and it has been there for weeks. Someone mentioned that it was shingles, its very itchy but not painful and it seems like its wont go away. The C-foam dried the rash and took away the sting or itch. I apply it, let it dry and it dries on the skin leaving a slight film. I also used the amazing soak on this rash, I poured some into a small glass bowl added a bit of water and applied with a cotton ball, that took the stink out of the rash too.