How To Treat Penile Lichen Planus And What Is The Recovery Time?

Hi i am 17 years and i have penile lichen planus. I am wondering if masturbation can cause it to stay longer or if it has no cause. After masturbation i notice it more red, i assume from friction but i am wondering usually how long penile lichen planus will last because i have had it for a little over a year now. I try to avoid sexual activity with girls because i don't want them getting concerned thinking it may be an std.