In most cases hematomas spontaneously revert , but in cases of large hematomas or those localized in certain organs ( `` e.g. '' , the brain ) , the physician may optionally perform a puncture of the hematoma to allow the blood to exit .
In most cases hematomas spontaneously revert . In cases of large hematomas or those localized in certain organs ( `` e.g. '' , the brain ) , a physician may perform a puncture of the hematoma to allow the blood to exit .