A vesicle, or blister, is a thin-walled sac filled with a fluid, usually clear and small. Vesicle is an important term used to describe the appearance of many rashes that typically consist of or begin with tiny-to-small fluid-filled blisters.
About UPHS Contact Us Site Map Privacy Statement Legal Disclaimer Terms of Use
The University of Pennsylvania Health System, Philadelphia, PA 1-800-789-PENN © 2013, The Trustees of the University of Pennsylvania