Despite his own medical knowledge from home- and the things he'd picked up here- the fact remains that Daryl is not a doctor, and there are people better suited than him to run the clinic in Martha's absence. He'd done what needed to be done, helped where he could help, but there'd come a point (and an utterly ridiculous video and text post to the network) when he'd had to step away for a while, see to other things while he'd still had the ability to do it and the stream of injured people had slowed.

Naturally Martha'd revived while he'd been out... Which is probably for the best when you realize that recently-dead bodies stirring around the guy who'd been living in zombie hell for the past year and a half before coming to Wonderland is probably not an ideal situation. Old habits die hard, you see... But no, he'd been out hunting down organs (and maybe heads, or maybe serial killers carrying heads), and by the time he makes it back, Martha is already up and about.

He stops awkwardly in the doorway when he spots her, shoulders visibly sagging with relief. It's not that he thought she wouldn't come back, of course... But knowing and seeing are two totally different things.

"You're back."

He figures he can get away with stating the obvious, just this once.