My wife gets heat rash, has suffered a bit in the past from exma (pardon the spelling) when she was a child and it seems after using RID tropical roll on her arms, her arms are now covered in tiny blisters and are quite itchy - rash like. Im of the opinion she needs to just ride it out because its now blistered which to me means its moving through the cycle of healing, next the blisters should fade and probably scar a little bit but thats my laymans opinion. Its been about 4 - 5 days old now it started as one big rash and fairly swollen or welty. Shes using calamine lotion which helps a tiny bit, best relief is a cold towel but thats temporary too. I know she really needs a docs opinion but does anyone by chance have a magic remedy that might stop the itching. I was thinking antihistamines but need a pharmacy, we are at bingin, theres probably a pharmacy out here somewhere.