Knee Pain And Bruising With No Injury

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Alternative Names

Contusion; Hematoma


Definition

A bruise is an area of skin discoloration. A bruise occurs when small blood vessels break and leak their contents into the soft tissue beneath the skin.


Considerations

There are three types of bruises:

  1. Subcutaneous -- beneath the skin
  2. Intramuscular -- within the belly of the underlying muscle
  3. Periosteal -- bone bruise

Bruises can last from days to months, with the bone bruise being the most severe and painful.


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