Hi, I can understand your concern for the puffy and burning hands. After reading the query, in my opinion it appears to simple Aquagenic urticaria which is induced on exposure to water. It is a common and simple problem and we very quite often see this condition in our day to day practice. I suggest you to take antihistamine tablet such as loratadine once a day one to two hour before bath. Do not pinch, pop or scratch or even touch the area unnecessarily as it can cause aggravation of the rash. Stay away from extreme of environment such heat and humidity. Take care.