Abstract: Psoriasis is a chronic, inflammatory, systemic, immune-mediated disease induced by genetic and environmental interaction, mainly involving the skin and joints. Oral mucosal lesion in psoriasis is relatively rare. Existing studies have shown that the most common oral manifestations of psoriasis are non-specific manifestations such as geographic glossitis and fissured tongue. This manuscript reports the diagnosis and treatment of a case of psoriasis with oral lichenoid lesions as the oral manifestation, and explores its clinical features, as well as the diagnostic and treatment approaches. The aim of this case is to provide valuable insights for the clinical management of this disease.

Key words: psoriasis, oral lichenoid lesions, oral manifestation