If you look at lichen planus under a microscope, one can see immune cells attacking the skin cells. The immune cells normally attack germs. No one knows why the immune cells attack skin cells in people with lichen planus. There is no specific treatment for lichen planus. Cortisone creams and ointments are sometimes helpful.
Antihistamines help the itching.
In most people the rash disappears in one to two years. Inc. All rights reserved. Disclaimer and copyright notice.