I wouldn't be so sure.

(He's going along with this joke. Also he's going to hand Ochako some supplies! Gauze, bandages, anti-septic, some painkillers?? He's not so sure about those.)

Here. You can take care of yourself from here, right? Keep it clean and covered and if you regain your feeling, you can take these. I'm not too familiar with them but it looks like there are instructions.