I recently developed a skin rash around my neck, which quickly spread to my chest area. I visited the doctor who said it was an allergic reaction, likely from a necklace or piece of jewlery. (Makes sense b/c I had recently purchased a new necklace - not real silver)
My skin is naturally super sensitive. He perscribed a steriod cream called ratio-clobetasol (0.05%) Although I'm still SUPER ITCHY :(..the redness and total inflammation has gone done dramatically.
Hope this helps - If you're suffering from any kind of rash that lasts longer than a day or 2, definitely go to your doctor!