Tried this with a hot safety pin on my pinky nail after smashing it in the door of my friend's bronco right before I graduated high-school, except I was dumb enough to do it the first night of a 3 day drunken camping trip where I got it completely filthy. It got infected, had streaks up my veins and my whole pinky was the size of a big toe. The doctor stabbed it about half inch above the nail with a scalpel and squeezed a bunch of pus out, then laid the blade flat on the nail and stabbed it into my bulbous pinky along the plane of the nail and found a bunch more. Shot in the ass and he said never do that again, just leave it alone!
Since then I have successfully closed a split scalp from kayaking and a nasty gouge to the top of the wrist with steri-strip wound closures and tegaderm that would have needed stitches otherwise, no infections