heal over
[for the surface of a wound] to heal. The wound healed over very quickly, and there was very little scarring. I hope it will heal over without having to be stitched.
heal someone of something
to cure someone's ailments. Are you the doctor who healed me of my wounds? Can any doctor heal us of a common cold?
heal up
[for an injury] to heal. The cut healed up in no time at all.
Physician, heal thyself.
Prov. Do not rebuke someone for a fault or problem you have yourself. (Biblical.) Ellen: You're such a spendthrift. You should go on a strict budget. Fred: But you manage money even worse than I do! Physician, heal thyself. Jane: You look like you're gaining weight. You should probably get more exercise. Alan: Physician, heal thyself. You're getting a little pudgy, too.