I can strongly recommend a ointment called ''Triamcinolone Acetonide''.
I went to the doctors for a unrelated thing last week and he suggested it.
After only 1 day I saw a HUGE difference, the white scales completly vanished.
I have been using it twice a day for a week now, no more scales. The redness is still there but is getting better each day.
The best thing is that it was dirt cheap, I have a decent prescription plan and the small tube only cost me around 3 dollars.
I have had psoriasis for about 10 years now, steadily getting worse each year. I have spent probably Thousands of dollars trying to treat it.
This is by far the most effective thing I have tried.
I hope this helps someone, good luck to all of my fellow sufferers.