Blood blister
A blister of trapped blood and lymph from skin damage.
A blood blister is a pocket of lymph, blood, and other fluids trapped under the skin after tissue and blood vessels are damaged without a break in the skin. If opened, it oozes a dark fluid. The trapped fluids may eventually dry, leaving a putty-like residue of dead cells. Pain can be severe from associated bruising.
Quick Facts
- Field
- Dermatology
- Causes
- Accident
Facts from the source article.
Causes
Blood blisters commonly result from accidents where the skin is pinched by a tool, mechanism, or heavy weight without protective equipment. They can also arise from forcible human contact, such as grappling. Friction from constant rubbing of skin against a surface, including ill-fitting shoes or repeated movement in sports like baseball pitching, rowing, or drumming, may cause them. Frostbite and mouth injuries, along with certain medications or nutritional deficiencies, are additional causes.
More in Skin Conditions Resulting from Physical Factors
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