I think people may be thinking about this one too much; despite the line in the middle "anything worth doing's worth getting hurt for" I don't really feel it's supposed to be at all deep. It reminds me of when I cut my finger last year and blood was everywhere and I ended up getting 7 stitches (I was REALLY ANNOYED that I had to go to the hospital), or when my ex hurt himself skating; I think the song is literally just about some seemingly minor, easy-to-get injury that still requires being taken to the hospital, and how if you live your life in a way you won't regret (so, not like a paranoid wuss who's afraid to leave the house), you'll probably injure yourself a few times.
I think people may be thinking about this one too much; despite the line in the middle "anything worth doing's worth getting hurt for" I don't really feel it's supposed to be at all deep. It reminds me of when I cut my finger last year and blood was everywhere and I ended up getting 7 stitches (I was REALLY ANNOYED that I had to go to the hospital), or when my ex hurt himself skating; I think the song is literally just about some seemingly minor, easy-to-get injury that still requires being taken to the hospital, and how if you live your life in a way you won't regret (so, not like a paranoid wuss who's afraid to leave the house), you'll probably injure yourself a few times.