OUCH! That does look infected! Meg is right about the antibiotic ointment. Bacitracin or The Triple action ointment is good. First, though, I'd scrub it up really briskly to loosen that scab and use some peroxide or antibacterial soap on it. It would also help NOT to wear a shoe for a few days - maybe just wear a loose COTTON sock to work and tell them you have to! Tell them the nurse said no shoe!!!