I have severe chronic psoriasis all over and although I've never tried skin zinc, I know someone who spent several hundred dollars on it. Yes it helped some what, but because of the high cost he couldn't continue using it and the psoriasis came back in full force. I'm currently in the process of enrolling in a clinical trial for psoriasis and am going to be put on enbrel injections. I've heard nothing but good things about it, although it too is mighty expensive. If u suffer from joint pain as well (psoriatic arthritis) then I'd highly suggest checking into it. Nothing else has worked for me, so I have very high hopes. Psoriasis sucks!!!
Good luck with it......Robin