Healing

Healing is an ability used by angels to repair the physical damage of others, usually humans.

Episodes

4.01 Lazarus Rising

As a side effect of Dean being resurrected by Castiel, all of his past wounds have been healed. As he relates to Sam in 4.05 Monster Movie, he has no more bullet wounds, knife cuts, no off-angled fingers from all the breaks. Also noticing his skin is as smooth as a new born's, as well as theorizing with his new body he is once again a virgin.

10.18 Book of the Damned

Charlie requests if Castiel can heal her carpel tunnel and bullet wound, which Castiel gladly obliges. Though suggests Charlie continue wearing her wrist brace at night.

12.23 All Along the Watchtower

After seeing that Dean has injured his knee, Castiel heals him of all injuries.

13.18 Bring 'em Back Alive

Seeing that Gabriel is severely damaged due to Asmodeus's torture, Sam ask Castiel to heal him, but he is unable to as lower angels can not heal archangels.