Blood blister


A blood blister can occur when the skin is rubbed, bruised or pinched. The unbroken skin that covers the blister may provide a natural barrier to bacteria and decrease the risk of infection.


A blood blister looks like a blood-filled bubble covered by skin


A blister usually heals on its own. One that doesn't heal or becomes infected needs medical attention.

Last Updated Jun 13, 2017

Content from Mayo Clinic ©1998-2020 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved. Terms of Use