Patients with platelet-mediated disorders often present clinical manifestations of bruising and bleeding. Although these changes are detected most frequently on the skin, the oral cavity also may exhibit signs of bleeding. In this report, we describe a patient who presented isolated oral features of hemorrhagic bullae with bleeding, indicative of a bleeding disorder. Results of laboratory tests revealed severe thrombocytopenia and a careful history disclosed dengue fever as the cause. The importance of recognizing the oral manifestations of thrombocytopenia is highlighted here, since the oral cavity is a frequent site of hemorrhage and could be the only manifestation of the disease.