Hematoma is very common problem encountered by many people at some point in their life. Hematoma is a collection of blood as a result of hemorrhage. In other words, internal bleeding. Internal bleeding from an artery, vein, or a capillary may occur as a result of trauma, injury medication, disease or surgery. A hematoma can occur within any area of the body, such as skin, subcutaneous tissue, muscles, bones, or any internal organ like brain or kidney for example. A hematoma is benign in most cases and eventually dissolves itself. However, sometimes it may show no change or continue to expand. In which case it requires medical evaluation. It should also be known that a bruise is a type of hematoma that occurs from capillary hemorrhage and can involve capillaries at any level. Bruises that are not very deep under the skin cause a visible discoloration. The bruise then remains visible until the blood is either absorbed by the tissues or cleared by immune system action. Depending on their location, various types of hematomas are described. Some commonly occurring hematomas that is often mentioned are epidural hematoma, subdural hematoma, [?] hematoma, subungual hematoma, sub chorionic hematoma, perianal hematoma hematoma, nasal septal hematoma, and so on.
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