Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Bullae
Medically reviewed by Min Clinic Staff | Updated: January 2026
Bullae: More than one bulla, a bulla being a blister more than 5 mm (about 3/16 inch) in diameter with thin walls that is full of fluid.
Blisters on the skin are called bullae.
In Latin a bulla (plural: bullae) was a "bubble, stud or knob." It referred to any rounded protrusion, particularly one that was hollow or cystic.