I used to have psoriasis on both elbows. The doctors told me that there is no cure for it, but I found some indications that the saffron tea might work. It did work, and now, instead of having my skin like sandpaper on the elbows, now it is rather like a baby skin.
Plus, for many skin problems the element zinc is very helpful. More precisely I am taking the pills containing zinc (50 milligrams) plus Vitamin C for two weeks daily every 3 months. Any pharmacy has it!