If it had really bad then Logan would have likely bled out, or had a nasty infection by now. Sharks were nothing to mess with but if he got away then he was fine and Jack needed to quell his panic.

"We should make up a fire so I can see what I'm doing," he said, moving to sit up. "It's been a long time since I bandaged you up. I don't think I can do it in the dark."