Hi, I have a really bad itch that is all over my body but I do not have any visible rash. It feels like its internal and its really bad. Whenever I scratch one spot it makes another spot itch just as bad. It starts with my arms and then spreads everywhere else. I went to the docters and they gave me some allergy meds but they don't seem 2 work. Any help 2 what might be causing this itch would be great