I tried for years to rid psoriasis, then finally said enough. I had severe plaque on legs arms back and buttocks. I did not want to go the route of internal meds. I did the following for two months. Committed to getting sun each day for an hour or so..front and back (no sun screen) lotion lotion lotion. one a day vitamin d supplement I used rx Calcipotriene twice a day...and lotion (vanicream) once or twice a day and clobetesol once or twice a week. I stopped red meat, dairy, eggs..and junk food...(occasional cookie) when shower, cool and scrubbed good over scales. in two months, gone..not a flake..and I had a lot..bled, etc....theres some red spots where the scales were but even they are fading. I still am in sun , lotion...less calcipotriene. My derm was in shock as was ready to put me on humira. Not sure this will help anyone, but it did me. Good luck.