A case of angina bullosa hemorrhagica
The present case has been reported in the Indian Dermatology Online Journal.

A 48-year-old male, a known case of hypertension and diabetes mellitus, presented with asymptomatic, single blood-filled blister over labial mucosa. On examination, non tender hemorrhagic bulla of size 1.5–2 cm in diameter was present over the inner aspect of lower lip.

It ruptured spontaneously and healed within 7 days without any sequelae. Hematological and coagulation investigations were normal. Classical clinical morphology led to the diagnosis of angina bullosa hemorrhagica (ABH).

Key takeaways:-
- ABH is a benign phenomenon, appearing as painless single or multiple blood-filled blisters over oropharyngeal mucosa.

- ABH usually affects the soft palate, but lesions may occur in the anterior pillar of the fauces, epiglottis, arytenoids, pharyngeal wall, and esophagus.

- Differential diagnosis must include thrombocytopenia, pemphigus, bullous pemphigoid, bullous lichen planus, dermatitis herpetiformis, epidermolysis bullosa, and oral amyloidosis.

- Diagnosis of ABH is essentially clinical and should not be confused with other severe chronic diseases of oral cavity. No treatment is required for ABH because the blood-filled blisters spontaneously rupture and heal.

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