My daughter is 25, 5' 5', 10stone. In June this year she noticed a small blister on the underneath part of her foot. It then became itchy and a rash then began to make its way up both legs, tummy, arms and her bottom. The rash is very very itchy which has broken the skin. She has been prescribed all sorts of creams, antihistimines, she has tried everything but to no avail. She is getting disturbed sleep every night with the rash being very itchy. On one foot it has become inflamed and slightly swollen. She has finally been referred to a Dermatologist next week by private consultation . I am worried what it could be and wonder whether you have any idea. Her GP has not done a skin scrape or taken blood tests. Please advise