Atypical Gingivitis: A Rare Entity.

An inflammatory response of the gingiva to particular allergens or an enigmatic cause is known as plasma cell gingivitis (PCG). This atypical form of gingivitis, which involves enlargement of the gingiva in varied degrees, is a sporadic, benign phenomenon. A 29-year-old female patient presented with painful, bleeding, swollen gums in her upper and lower front teeth region for the past one and a half years. There was no history of parafunctional habits such as mouth breathing, and no history of changing dentifrice recently. Her personal, family, and medical histories did not play a role. On examination, there was enlarged and inflamed gingiva, and a normal complete blood count report. The case was diagnosed as allergic PCG after appropriate investigations and consideration of differential diagnosis. Histopathologic analysis supported the clinical diagnosis. Gingival recontouring was surgically done. To maintain dental hygiene and prevent recurrence, the patient was advised to avoid specific foods. Following a proper histological and clinical diagnosis, a comprehensive treatment plan should be developed.