Those are normal bruises. Just let them heal naturally. I took a crash a few months ago and had trail rash and deep tissue bruising where I took a set of Carbon Fiber Eastons in the back and snapped them in half. My boyfriend (now husband) made me take a couple of days off riding, but I couldn't do abdominal work for a week. My back and abs weren't bruised, though. They should disappear in a week or so.
If you need to cover them, there's always the makeup option.