Back on Someone's Feet

Definition:	To recover, usually from an illness; to feel better after being sick.
Example:	1) Rick has been in the hospital for a week, but he'll be back on his feet in no time.

Example: The big bang theory, Season 8, Episode 15

Bernadette: I know you don't like Stuart being in the house, but the store's about to reopen, I'm sure he'll get back on his feet.
Howard:  That would be great. I'd love for things between me
and Mom to get back to normal.