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A hematoma (US spelling) or haematoma (UK spelling) is a localized collection of blood outside of blood vessels, due to either disease or trauma including injury or surgery and may involve blood continuing to seep from broken
They may occur among/within many areas such as skin and other organs, connective tissues, bone, joints and muscle.
A collection of blood (or even a hemorrhage) may be aggravated by
Some hematomas are visible under the surface of the skin (commonly called bruises) or possibly felt as masses/lumps. Lumps may be caused by the limitation of the blood to a sac,
The slow process of reabsorption of hematomas can allow the broken down blood cells and hemoglobin pigment to move in the connective tissue. For example, a patient who injures the base of his thumb might cause a hematoma, which will slowly move all through the finger within a week.
In most cases, movement and exercise of the affected muscle is the best way to introduce the collection back into the blood stream.
A misdiagnosis of a hematoma in the vertebra can sometimes occur; this is correctly called a