hello ,Mr Vijay ,
Welcome to health care magic forum,
up till now u must be very well aware about the causes , medications n course of the lichen planus
, but will just like to add up by suggesting you that though it a very curable disorder but the relapse may follow up if its not been cured, so better start up with Homoeopathic medications which will cure the disease from the root cause .
homoeopathic medicines are very safe , effective and natural .
for more info u can write down (firstname.lastname@example.org)
wish u good health always .godbless!