1) Tape (whatever you have on hand),
2) Gift card (whatever you have on hand, preferably one that is empty).
3) Cotton, gauze or some sort of padding to prevent a blister.
Cut two pieces of tape long enough to wrap around the finger and splint at least 1½ times.
Mold the Card to Wrap Around the Finger
Add Padding Put the cotton, gauze or some sort of padding between the finger and the splint.
The Splint Put the card around the padded finger.
Tape Wrap the tape around the finger and card in 2 places.
Note: The Tape should not be wrapped too tightly, otherwise your finger will become numb. If you notice any funny sensations in your finger then unwrap the tape and wrap the tape more loosely.
(please eventually see a doctor tho)