Um...You held your fingers over an open flame and burned the psoriasis off?
Seriously, I actually sured a pretty bad case of it, using “new Skin’ painted on the ends of my fingers. It was an open, bleeding sores mess that I was wearing vinyl gloves to keep blood off of my keyboard. I tried painting the ‘New Skin’ on, to avoid the sweaty gloves. The psoriasis went away immediately and has never returned. A doctor friend says I should write it up and submit it to JAMA or the podiatric journal. I’m retired from the pharmaceutical business, so I told him he could do it, if he would treat one or two patients that way and see if they got similar results. I haven’t had lunch with him for two years now, so I don’t know if he did it or not.