DMSO, wow, not being funny but I work in a research lab, in my previous experiments using DMSO in cell cultures, what i found was that DMSO enhances cells to undergo apoptosis, so if I apply this theory to your DMSO and brusing which will then explain that the DMSO enhances the bruised cells of the area to undergo apoptosis and then new cells will be rapidly replace by mitosis thus enhancing bruise recovery using DMSO.
good stuff , thanks kronk that kinda explained my findings of my experiment!!