Dealing with RA, Lupus and Arm Rashes

Hi, I have just been told I have RA and most likely lupus as well. I have to go see a dermatologist for these terrible arm rashes I keep getting which is why I was sent to a Rheum to begin with. It’s been a year with them. They come and go, are circular. Make my skin rough and when they go away my pigment is changed. I see the rheum derm specialist in 2 weeks. But I’ve been having a really bad flare this week. Any suggestions for creams I can use to help? I’ve tried cortisone, regular lotions and excema creams. Nothing helps. I also have PIA, EDS. But the Rheum stuff is new.