Pemphigus vulgaris (PV) is a chronic, potentially life-threatening autoimmune mucocutaneous disorder that significantly impairs patients' quality of life. While systemic corticosteroids and immunosuppressants remain the standard of care, many patients suffer from persistent, painful oral lesions that exhibit delayed healing or poor response to conventional systemic protocols. This clinical trial investigates the efficacy and safety of supportive topical interventions: clobetasol propionate 0.05% mouthwash and photobiomodulation therapy (PBMT)-a non-invasive approach designed to accelerate tissue repair, and their combination. The primary objective is to identify effective adjunctive topical therapies that can facilitate the healing of oral erosions, mitigate pain, and potentially allow for a reduction in systemic medication dosages, thereby minimizing long-term treatment-related complications and improving overall patient outcomes.