Piercing, scars or any other noticeable thing like that in someone else gives me a sensation on the same spot on my body if I see/recognize/notice it. If someone gets punched, kicked or injured in a movie or such I also can get a similar sensation but to a lower degree if I frame it in my mind that it is fake, if someone visibly breaks a bone or gets injured in a sports game then that has a much more distinct, acute and entirely unpleasant sensation. I don’t watch much sports to keep that from happening.
I believe it is a type of synesthesia called Mirror Touch.