edit: nothing, don't stress it out and let it heal itself, it'll take awhile.... do NOT play with it, the best way to heal it is to promote blood flow, once the swelling has gone down soak your hand in cool/cold water. cold water naturally makes your blood a little thinner (trust me, not dangerous) also take some aspirin. thinner blood will increase the circulation and movement of blood through your hand. its not a miracle cure and won't heal it over night but it might cut 4 weeks down to 3 1/2