Hematoma: If the bump was surrounded by black and blue bruising type discoloration, it most likely is a hematoma (blood clot) from bleeding under the skin. This may gradually decrease,dissolve and disappear. Occasionally hematomas harden and don't disappear. If they become,hard and tender,they can be removed with a small incision.
Answered 3/1/2019
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A doctor has provided 1 answer
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