I broke my left arm after falling off of monkey-bars when I was like 9ish. Cracked my funny bone right near the elbow, so I had to wear a cast for about 6 weeks. Fucking everyone at primary school wanted to sign my cast for some reason. Scored 2 TDs playing football while wearing it (the only 2 TDs I remember scoring, go figure). Also fell off the edge of a small pillar at a shopping center and bruised my knee to the point where I had to use crutches when I was maybe 10-11. If it counts as an "injury" I had to get surgery for appendicitis at one point and had trouble walking for a week coz it fucking hurt.
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I twisted my leg terribly when I was two years old. It was so bad that my parents were investigated for child abuse. Thankfully, they determined that my parents were fine and my leg recovered after several months. I then broke my elbow when I was five years old by falling off my top bunkbed. At 17, my lung spontaneously collapsed while relaxing. It collapsed a second time two months later, which required surgery to fix. Fun times.