Some breaks or dislocations in your finger may be able to be set without surgery. Your doctor will look at your finger and take x-rays before determining if a closed reduction is the right choice for you.
You will be given pain medicine before your finger is set. The doctor will pull and move your finger to make the bones line up where they are supposed to go. Once the bones seem to be in the right place, you will have another x-ray to confirm. You will be given a splint or another method of keeping your finger where it needs to be while it heals.
If the finger doesn't heal as expected, you may need surgery.