Story time!
I broke my left arm (writing hand) when I was 6. I was playing on one of those exercise bike machines, and fell on the concrete floor on my arm. I was being babysit by my aunt at her house and she didn't know what the forget to do. So, I was in a bed in my aunt's house for an hour suffering with this broken arm, and the aunt didn't call 911. Hell, I don't even know if she called my mom when it happened.
When I got to the hospital, I got what i believe is a metal plate put into my elbow.
My arm was in a cast for around 3 months after the incident. I still have that plate in my elbow to this day, along with a little scar.
The only really bad thing about this is that whenever I bump my elbow on something, it hurts like HELL. It's not a good feeling.