Hi Doc, I m allergic to shellfish and every time I go to the beach for vacation I get a heat pickley rash on my arms, hand, legs and feet. I m not sure if it s from the heat, iodine or mixture of heat and fluids fromy the fish. My body is swollen, hot, plickly, pumpy, itchy and burninget. Any ideas what it could be? The only thing thatso helpping a little is sitting in water and rubbing baby oil.