I have developed a rash inside both thighs. I am a male 57 yrs old. Last year I had injections for a trigger point in my back. two weeks later I developed the rash, but thought it might have been from being laid up with pajamas on for weeks at a time. this year I had a bad shoulder, and the doctor again gave me an injection. 3 weeks late I developed the same rash as I did last year. I still had some of the powder that was one part of treatment, but after a week of its use, I haven;'t seen any change. I believe I was given a zpack of some sort last year, but I dont know what it was. Is hydroxyzine used as one form of treatment?