Sprains may be treated at home, but it can be hard to tell if you have a sprain or if your finger is broken. If your finger does not improve or gets worse, or you think you may have broken it, see a doctor for an x-ray.
To treat a sprain in your finger, don't use the finger you hurt/ the hand you hurt. Put ice on the injured finger periodically, always wrapping it in a towel first. Wrap it in a compression bandage, but be careful not to make it too tight. Regularly hold the hand up higher than your heart to reduce swelling.
Anti-inflammatory pain medication may be taken.
If your finger isn't improving, talk to your doctor about a splint and tape, or if surgery is needed.