Oral Lichen Planus is a chronic inflammatory condition that affects the mucous membranes inside the mouth. It often appears as white, lacy patches or red, swollen areas, and can cause discomfort or pain. The exact cause is unknown, but it may be related to an immune system response. This condition can occur in anyone but is more common in middle-aged adults. While Oral Lichen Planus is not contagious, it can be associated with other health issues, such as liver disease or autoimmune disorders. Treatment focuses on managing symptoms and may include topical medications or lifestyle changes.