One of the allergens on the 5 Day Extended Patch Test for Allergic Contact Dermatitis, ACD I tested positive to is in hydrocortisone. I had to argue with a gynocolgist who insisted I must use it and that there was no such allergy. Well the reason this is included on the test is because some people like me are. I sent that gynos office a copy of my test report and found another gynocolgist. Those of us with eczema that have self educated ourselves are often surprised at how many doctors are ignorant when it comes to our disease. It's understandable why we were ignorant in the beginning.
If your biopsy for GD comes back negative it may not mean you don't have it . I had all the classic symptoms' and yet my biopsy was negative, that was because by the time I found a derm who didn't simply assume it was my ACD it had been going on for almost a full year and had about run it's course for the 1st breakout. The papuales, although crusted were not active. As you will learn, even when going dormant it takes months for them to fall off. I could have had another biopsy when 6 months later my recurrence began, but I didn't bother.