When I took Remicade, I had the exact same thing. My GI doctor told me that it happens to a small percentage of people. Ironically, Remicade is used to treat psoriasis, but can cause it in some people. He told me that there was nothing they could do, and that it would go away when I went off the drug. Remicade didn't work for me, so I didn't have the side effect for long. You should talk to your GI doctor about it. Perhaps Humira, or the other alternatives wouldn't have this effect on you.