Angina bullosa hemorrhagica: report of 7 cases and analysis of 199 cases from the literature.

Angina bullosa hemorrhagica (ABH) is a condition characterized by blood blisters in the oral or oropharyngeal mucosa. Typically, the first presentation of ABH is acute, and rupture of the blisters occurs after a few hours or days. Although its etiology is unclear, ABH is assumed to be associated with predisposing factors such as local trauma or chronic use of inhaled steroids.