Nothing worse than crushing something. A cut hurts a lot less. Crushed and fractured my fingers many times in my line of work. Last time it was a 70 lb. lathe chuck that I forgot to pull my finger out from under as I set on a steel bench. The best thing for relief of the pain is to drill a small hole thru the finger nail to let out the blood and pressure underneath. The swelling can not go anywhere because of the nail and that is where most of the pain is from. Once the hole is there the blood can get out and the pain is much less. Do not use a hand drill

just use your fingers to twist the drill in gently. The nail is very soft and drills easy. Sounds sick but it does work. Paul