Deb,
I too have the dreaded Lichens Sclerosis, though I do not have Hep C...just a partner.
It is an autoimmune disorder and like you I have had horrible episode.
At one point they put me on prograf CREAM. Which made me sick as a dog and they had to change it.
Since then I have so much respect for all the TP folks who take that stuff every day.
Within one half hour of using the cream, I was nauseous and continued to be nauseous the rest of the day.
The docs never said why one person gets it and another does not.
Best
Carol