For people suffering from oral lichen planus, simply chewing on sage can be a very successful Natural Treatment for Lichen Planus that can help take away some of the pain. If you find chewing on sage is not easy, then you can prepare a tea with dried sage and drink that up instead. People have been using oats to treat skin disease and to decrease skin inflammation. It has anti-oxidant properties that decrease irritation and soothe painful lesions. Oats are an effective Natural Remedy for Lichen Planus.