For the scalp, use pine tar shampoo. For all body parts, avoid water at all cost. This includes sweat. Avoid salt. Try a high protein, low carb diet. Lecithin also helps. Particularly when you have large clumpy plaque.
Lecithin may heal. I came down with a moderate case of Psoriasis this year when I turned 61. I took a large number of Lecithin capsules a day as I read that it could heal it. My plagues almost totally went away ~ then they gradually came back!I have been on a very good diet and many supplements for many years. For me, the healing may take more time and effort. Vit. C and D capsules will also help. I pray that this helps someone reading!