Get another splint,tape it up, do not aggravate it and ice it everyday.
can i play golf with mallet finger wearing a splint
A buddy splint, such as taping one broken finger to the other.
You can get a finger splint or better yet you can go to your family doctor and ask that.
Answering "How long should you need to keep a splint on a broken finger?"
A splint for mallet finger is usually recommended to be worn continuously for 6-8 weeks to allow the tendon to heal properly. It is important to follow the specific instructions given by a healthcare provider for proper healing and to prevent complications.
It is not recommended to sleep with a finger splint on unless specifically advised by a healthcare professional. Sleeping with a splint on can restrict blood flow and cause discomfort, making it important to follow the guidance provided for wearing the splint.
Eiether get a splint or put ice on it
Application of finger splint; static
"The first step is to act quickly, take immediate action in order to stabilize the finger and make sure no bones are broken. In order to do this, you need a splint and first-aid tape. Rest your finger on the splint and wrap tape around it tightly so that you are unable to bend the finger."
Usually a piece of metal that goes under a finger and is held in place with tape to keep the finger stable while it heals from an injury.
Application of finger splint; static
The easiest way would be to tape the broken finger to an adjoining finger, like the ring finger. You could also get a padded aluminum finger splint and put that on the broken finger.