Hi Lima. I looked it up. I do not know if you would be willing to try essential oils on your scalp and face. This I use instead of expensive creams for my face anyway. Since my cancer, I make an effort to keep as natural as possible. I buy organic as much as I can, I drink water from glass, never plastic, and I do not use anything on my skin, if I cannot eat it. So, "first press organic coconut oil", in which, depending on the amount of oil, I mix sacred frankincense essential oil from Young Living. It is supposed to help with inflammation. I would try it in a small area first. This might sound silly, but I never took any medication for Lichen Planus, and my heart goes out to you, so this is all I can recommend. Hopefully, some of my friends from this blog, can help.
Loli