A Rare Case Report of Angina Bullosa Hemorrhagica

Abstract

Background: Angina Bullosa Hemorrhagica (ABH) is a rare, benign disorder characterized by the sudden appearance of blood-filled bullae in the oral mucosa without any identifiable systemic, hematologic, or autoimmune cause. We report a case involving a 66-year-old diabetic male who developed a solitary hemorrhagic blister on the right buccal mucosa shortly after eating. The lesion resolved spontaneously within 24 hours without medical intervention and showed no recurrence over a one-year follow-up. This case highlights the classical presentation of ABH and reinforces the importance of recognizing its self-limiting nature to avoid unnecessary investigations and treatments. A brief discussion of the clinical presentation, possible etiological mechanisms, differential diagnosis, and management is provided to increase clinician awareness of this often underdiagnosed condition.