@andwho
(love your user name btw!)
There's really no way I can give some kind of definitive answer because we are all so individualized with LS. I read a lot of posts about burning with urination and women are even using spray bottles to remove urine. If it was me I'd let my doctor know the Silvadene burns. Also ask if it is the result of LS.
I would never ignore any open wound/sore and work with my doctor to help heal it. It's the nature of these support groups to refrain from giving out medical advice. I actually appreciate that. Instead of medical advice we can help by sharing our experience. I have been back and forth to my gynecologist since this diagnosis. We deserve to learn what we can to live with a chronic condition like LS.