I've noticed that my right hand seems to have undergone changes due to the prolonged punching training. For example, my index finger bends slightly more toward the center of my palm, enabling a tighter grip. It doesn't hurt or feel weird in any way and I only just noticed the changes.
I guess the best visual description would be that the middle index joint seems to be slightly rotated clockwise. I'll get it looked at some point, to get a professional opinion.