Kain99 said:
It's normal for a small amount of blood to appear when you inject insulin. This bleeding, which is usually caused when the syringe punctures a tiny blood vessel, can be stopped by putting pressure on the injection site with your finger or a cotton ball.
Injection Sites
I've gotten blood before, so I'm usually not worried about it.
This wasn't a little bit though. This was blood like you get when you cut yourself shaving. If I didn't inject directly into a vein, I almost certainly punctured one.
I did a little search though - turns out, even if you do inject it directly into a vein or artery all it means is that the insulin will wear off in a few minutes, as opposed to a few hours, so theres a little risk of hyperglycemia. Although, that's not much of a problem with me these days. I think I need to reduce my insulin dose. My sugar is rarely over 80 except right after eating lately.