Writer and actor B. J. Novak said the idea for "Injury" started out as an idea in the writing room that just "spun out of control". The original plan was for Michael to have fallen asleep in the sun, while having sunblock all over him, except for his foot. According to BJ Novak, the episode was originally going to be called "My Grilled Foot", but writer Mindy Kaling thought it was "too weird for people to tune in and watch that". Novak has described "The Injury" as one of his favorite episodes, and said of it, "I don't think any other TV show would have made an episode from that starting point, and yet it was one of the funniest and most relatable episodes as it went on that we've ever had."