Ice, elevation and rest - and check with your doctor. If the injury involved a cut, medical evaluation is particularly important - check whether or not a tetanus shot, antibiotics or other treatment is needed. Depending on the problem, a therapist can be very helpful in providing a protective splint and supervising special exercises to improve movement and strength. Confirm that this is the problem. X-rays are usually needed to show exactly what the problem is.
Treatment really depends on the type of break.
Again, it really depends on what the break is. The biggest problem people have after a finger fracture is stiffness. Stiffness means difficulty bending or straightening finger joints. This is very common, and is more likely the closer the break is to where the finger meets the hand. The best way to prevent stiffness is to move joints as soon as possible.