Bullae are large blisters on the skin that are filled with clear fluid. Many different skin conditions can cause bullae to form. They can be caused by infection or inflammation of the skin.
Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.