I have recently come out in a patch of what is suspected to be eczema or psoriasis on my elbow. It’s quite red and angry at times, but also very dry. I’ve got a steroid cream for it, which is helping. I have a wedding to go next week and need to fake tan. My dress is sleeveless and I have a horrendous runners tan. How do I do this? Do I just use a gradual moisturising tan, or apply a barrier cream to this part? Help!