Oral lichen planus (LP) is a common, chronic inflammatory condition of unknown etiology, which affects 1-2% of adults. Current evidence suggests an immune-mediated mechanism. All age groups may be affected, but adults over 40 years of age predominate with a female-to-male ratio of 1.4:1.
Often referred to as thrush, it is the most common form and may present with a burning sensation.
* Note that extra-oral Lichen Planus has a very different appearance described as purple, polygonal, pruritic (itchy), planar (flat-topped), papules, and plaques.
Gonsalves WC, Chi AC, Neville BW, Common Oral Lesions: Part I. Superficial Mucosal Lesions, AFP 2007;75:501-507.
Pappas PG, Kauffman CA, Andes D, et al. Clinical Practice Guidelines for the Management Candidiasis: 2009 Update by the Infectious Diseases Society of America. Clinical Infectious Diseases. 48(5): 503-535.