I had what I called the Rash From Hell. It started 3 years ago after an extremely high stress episode. First my face broke out with oozing, itching & burning. That cleared up after 3 months, then it showed up on both hands. Couldn't prepare food, do dishes, household chores... That took about 3 months to clear up. Next was my legs - ankles, thighs and calves. Then my arms.
I went to the ER when it was at its worst. 4 times. No help. I got a range of diagnoses from "some kinda rash" to shingles to pellagra! No M.D. ever figured it out. Just prescriptions up the wazoo to treat their guesses. I didn't take them.
After researching off and on for almost 3 years, I finally realized it was psoriasis, which I then researched intensively. After less than a week, it is now 80-90% cleared up! Here's what I did...
I started taking 50 mg of zinc 2X/day. Won't mention brand name, but it's "zinc (as zinc gluconate dihydrate, zinc picolinate)." Chelated. You may want to try a higher dose or take more than twice a day -- I only weigh 88 lbs, so you may want to adjust accordingly.
The sores are 90% gone. All I have left are a few areas of flaky skin, mostly on my shins.
For dead skin clean-up, I'm using a solution recommended by Tony Pantalleresco made of about 16 oz white vinegar, 1 rounded tablespoon of sea salt, and 20 drops of 5% lugol's. Shaken - not stirred. :-) I dampen a wash rag with it and then gently rub off the dead skin.
I won't call this solution a cure, but it will help keep the dead flaky skin to a minimum, and some areas where I've used it have stopped being flaky altogether for about 3 days now (but that could just be the zinc doing its work).
I tried many many things over 3 years' time before I realized what I had, so feel free to ask me about something you're considering.