Psoriasis More Condition_symptoms How Can I Improve My Psoriasis Without Using Steroids?

How can I improve my psoriasis without using steroids? - psoriasis more condition_symptoms

I have psoriasis on the scalp only. I have worked with steroids during the last few years, but my doctor gave me more than he says it makes my skin is too thin. How can I control what more could of course be? Thanks