EMPLOYEE WAS LOWERING A SLEDGE HAMMER TO THE FLOOR. HE STRUCK THE INSIDE OF HIS LOWER RIGHT LEG,CAUSING CONTUSION OR HEMATOMA. SENT HIM TO DOCTOR TO BE CHECKED 12-27-00. DOCTOR SAID HE WAS O.K . BUT TO RETURN FOR FOLLOW UP 12-30-00. AT THAT TIME LEG HAD BECOME SWELLED. DOCTOR MADE INCISION TO DRAIN FLUIDS ON LEG. NO LOSS AT WORK OR RESTRICTIONS.