Background: Psoriasis is a systemic autoimmune condition that affects the skin and may be associated with various diseases. Psoriasis can affect the nails, joints, and mucous membranes. Emerging studies have shown the presence of abnormalities in the oral mucosa; however, most have focused on linguistic pathology. Objective: Determine the frequency and types of oral lesions in the oral mucosa in individuals with psoriasis in Chile. Methods: Participants included individuals over 18 years old, of both sexes, diagnosed with psoriasis. Patients with other diagnosed diseases were excluded. They underwent oral examination conducted by oral pathologists at the Dental Clinic of the University Andrés Bello. In cases where oral lesions were detected, various aspects such as type, location, color, surface, shape, consistency, and size were recorded following established criteria. Results: The study included 22 individuals diagnosed with psoriasis, with 77.3% being female and 22.7% male, and an average age of 30 years. Among the examined individuals, 63.5% presented oral lesions. Fissure was the most common elemental lesion, observed in 22.7% of patients. Additionally, 22.7% of psoriasis patients presented with fissured tongue, while no examined patient exhibited geographic tongue. Conclusion: Chilean individuals with psoriasis exhibit a notable frequency of oral lesions, particularly with the diagnosis of fissured tongue.