splease help. for a year now i get itchy red blisters whenever i eat bread products or pasta. when blisters pop (from scratching), clear fluid comes out, then it scabs over, then when scabs go i am left with purplish marks on my arms. this is localized to my arms (shoulder to fingers). gi doc ruled out celiac and told me to see a dermotologist. gp disagrees and will not send me saying dermotologists dont know rashes. please help me, i dont know what to do next.