Does anyone else have scars they've had their entire life but no idea where they came from?

Today as I was showering I realized that I have two scars on me that I've had my entire life, but I have no idea how they got there. I've always had them but never thought to question them until I got a good look at both of them. The first one is on the inside of my right wrist and the second one is on my chest underneath my left nipple. The chest one looks kind of surgical as it's a straight slash but without suture marks but the wrist one looks like it would have been more of a puncture. There isn't anything in my medical history that would indicate surgery (I didn't get my first surgical procedure until I was 25 and that was to get a wisdom tooth removed). I thought it was weird and wonder if anyone else has lifelong mystery scars.