I heard somewhere, and then looked it up on the net to confirm, that the tendons on the back of the hand are very close to the surface. ANY cut on the backs of the hands should be looked at by a doctor. (No, I don’t follow those instructions, but perhaps I should.)
But, it seems like it can happen where a cut on the back of a finger can nick a tendon, which in time can tear, and then it gets pulled apart and breaks like a rubber band. And then is hard to reattach.
I have no idea if you are being sincere or not. I am not a hand expert, but I do know what it’s like to have a hand injury. I also believe that people who try to tell others how much pain they have or whether it is real or not are idiots.
I am not saying that is you, but there are others on here who apparently think they have some magical insight into the minds and intent of others, not to mention their physiology.
It is astounding!