There are a couple of ways to clear psoriasis without using expesive creams that the doctor wants to sell you! Like flintrock mentioned a gluten free diet helps out alot of people. Problem with this offcourse is the time it takes for the diet to take effect and start clearing up your skin, it takes a month or 3 to see results with this treatment.
So this is not a option for people that are looking for something that will work in a couple of hours/days.
I would reccomend you to use a natural option or proven cream for immediate relief and start with a gluten free diet to help clear you psoriasis after a couple of months.
This way you can have less itching and pain today but still get off the expensive treatments after a short period of realy sticking to the diet.
I use dermasis cream for when I have heavy flare ups of my psoriasis.
I use argan oil as a daily treatment for my skin this helps a ton and also helps keep my psoriasis from not getting out of hand. I have recently switched to a gluten free diet but its to early to see results I think I am in week 3.5. I hope this is helpfull for some that are looking for treatments. I have had this condition for my whole life and have tried a ton of differnt things some are a total scam or overpriced. People just need to do good research try out alot of differnt stuff and stick with the stuff that feels like its working.