I HIT MY SHIN, JUST A FEW MOMENTS AGO, UNDER MY DESK, IT IMMEDIALITY DENTED AND NOW HAS A MARBLE SIZED CIRCULAR, PURPLE LUMP THERE AS WELL.....BACKGROUND HIT MY SHIN A COUPLE YEARS AGO ON THE OPPOSITE LEG, DID NOT HAVE A DENT BUT A GOOD SIZED PURPLE KNOT THAT BECAME INFECTED AND I HAD TO HAVE IV ANTIBIOTICS, THEY SAID IT WAS A SEVER HEMOTOMA AND POSSIBLE CELLULITUS.....I HIT MY SHIN THIS TIME HARD, BUT NOT THAT HARD, WHAT IS GOING ON??