what is a blister with blood
A blood blister is a type of blister that forms when subdermal tissues and blood vessels are damaged without piercing the skin.It consists of a pool of lymph, blood and other body fluids trapped beneath the skin. If punctured, it suppurates a dark fluid.lood blisters also may occur with friction caused by constant rubbing of skin against a surface. Because of this, baseball pitchers and drummers often contract blood blisters on the fingers. They also form as a result of frostbite.