More serious hematomas located near major organs—especially those in the head area—may require a diagnosis with imaging and ...

"If a hematoma is accompanied by symptoms such as severe pain, numbness, weakness or if it affects the function of a limb or organ, it needs to be evaluated by a healthcare provider," says Whyte.

Dermatology Nursing. 2007;19(1):83-84. Athletes may develop sports-related subungual hematomas. Repeated trauma to the nail bed occurs each time the toe contacts the inside of the sneaker.