How To Cure Discoloration At The Sight Of Bruise,swelling And Pain Of Toe?

I push carts at a grocery store as a job, the other day I accidently ran over my foot with some shopping carts. A day later I noticed my middle toe was a little swollen and painful. At first, I thought it might be an ingrown toenail so I made sure the nail was ok by cutting the edge. Tonight I noticed what was the bruised area is now blackened and the surrounding area is hardened like dry skin.The hardened dry skin part is just skin colored (im white) but is rough to the touch. Should I be concerned at all? It doesnt hurt now...
I do not have diabetes, if that makes a difference.