Efficacy of Photobiomodulation in the Treatment and Relief of Pain in Recurrent Aphthous Stomatitis

Inclusion Criteria: * Patients over the age of 18 * Patients presenting at least one painful mouth ulcer (minor ulcer), located on the tongue, jugal mucosa or labial mucosa, starting on the same day or the day before. Exclusion Criteria: * Patients who have already undergone other treatment for RAS; * Patients with asymptomatic ulcers; * Patient must not be undergoing or have undergone any treatment for RAS; * Patients with any systemic condition related to RAS - e.g. Behcet's Syndrome, Periodic Fever Syndrome, Pharyngitis and Cervical Adenitis, HIV infection.