Dark Silvery Patches On Fingers, Suspicion Of Psoriasis. Which Medicines Should Be Taken?

I am suffering from bad silvery/dark patched in my fingers since past 4/5 years. Local homeo doctor opined it as psoriasis . Kindly suggest me internal and external medicines for remedy. for some days I have taken Betnasol tabs and having good result. But somebody suggested me discontinue it because it is a steroid group of medicine. Please suggest. S. Bandyopadhyay YYYY@YYYY Male, 57 years, Indian.