I developed a redness on half of my neck going down and including my trunk - mostly upper chest and entire back. A day later a rash appeared with much itching. The itching continues although the rash is diminishing. Now on my upper back an area about the size of a nickel has developed as a fluid filled blister and there are two areas on my wrist - the inside and outside like two inch wide stripes with no discomfort. The itching continues on my trunk. This is baffling. All began about two weeks ago. I feel well.