Kids with high pain tolerance

Hi I'll add this. My 19 year old bio daughter has always had a high tolerance for pain. During her soccer and basketball years, she would be in pain from injury but would say zero. She would play on broken bones before saying something. When she was a preschool, she broke her little finger and didn't comment on it all day. When I picked her up, I noticed it was sticking out side ways and asked if it hurt. She said yes and then discovered it was broken. I onced asked her why she never speaks up and she told me she didn't want to stop what she was doing or miss out on the playing. Go figure....