What to do with a swollen finger?

When a swelling injury occurs use the RICES principle: Rest, Ice, Compression, Elevation, Support. Ice for 20 minutes then rest for and hour, repeat until you have to use it, when you don't have the ice on it you should have some sort of tight wrap going all the way down the finger with it being tighter around the nail and looser as you go down to push the swelling out. Also when ever possible keep you finger above your heart to allow the swelling to get pushed out. Support is the same as your compression.