Please document your rash in photos, print them out & take them to the derm @ your appt. The rash may not look like your photos or be flaring when you see the derm. You can't rely on just telling the doc what it looked like, you need to show them!
Do NOT get a biopsy if you have taken oral steroids or used topical steroids in the past 2 months.
DO NOT go gluten free or even gluten light until AFTER the biopsy has been performed.
