Blister
small pocket of fluid within the upper layers of the skin
(Redirected from Blisters)
A blister is a small pocket of fluid in an upper layer of the skin caused by friction, burning or freezing. Most blisters are filled with a clear fluid called serum or plasma (blister water). Some blisters, however, are filled with blood; they are called blood blisters.
![](http://up.wiki.x.io/wikipedia/commons/thumb/d/d0/Blister_roundup.jpg/220px-Blister_roundup.jpg)