question: I have nail psoriasis on both thumbs and nowhere else.  I have been to 4 different doctors and tried several different topicals over the past year.  Sometimes I see some improvement but then it gets worse again.  Then I took a 2 week vacation and spent a lot of time in the sun.  When I got home the skin had become smooth and the nails had begun to grow normally.  I have read about light therapy and Xtrac laser, but my doctors seem hesitant to go there.  He wants me to try Ultravate, but it seems topicals dont work cause I wash my hands frequently.  What can you recommend?