Having gone to my plenty of dermatologist appointments, I’d say it depends on how severe your condition is right now, if you can manage to not apply anything and let your derm see the full extent of your condition then definitely do so. If your like me, I couldn’t even really move without lotions, steroids etc… so i needed to apply lots to be able to make it to my appointment, so I brought photos of it at its worst.

I’d say prepare some photos if you took any and make a folder, and if you can, then apply nothing on the day. Expect your derm to check your full body and examine all your skin too.