Psoriasis is a chronic inflammatory disease associated with risk factors such as obesity, and tobacco smoking, and significant comorbidity including diabetes or periodontitis (1). Depression, bipolar mood disorder, anxiety, psychosis, cognitive impairment, personality disorders, eating disorders, and suicidal ideation have been linked to psoriasis (2). Because psoriasis does not manifest on mucosal surfaces the oral cavity is rarely inspected during routine dermatological investigations.