I have guttate psoriasis and have tried prescription topical creams and UVB. It would work after more than one year of 3-times weekly treatments. Three months ago I discovered the Mavena Derma Center through this web site. Mavena combines dead sea baths with UVB. I am now practically clear with only 2 treatments a week for 3 months. Unfortunately, the only US location for Mavena is in Chicago. But if you are in this area, go to Mavena and get help.