Lichen Planus on the penis

Hello

I was diagnosed about two years ago with Lichen Planus. It manifested itself primarily on my arms and legs, also on my tongue and on my penis. I visited a homeopathic doctor and was very pleased with the progress. It disappeared from the arms and legs.
However, it remains stubbornly on the penis and I am feeling very frustrated by this. It makes no sense. If anyone has any suggestions I'd be very grateful.
Thanks a lot.