Buddy strapping tapes an injured finger to its neighbor so the healthy finger acts as a moving splint.
It HELPS with collateral ligament sprains, jammed fingers and some stable fractures, because both fingers keep bending and the ligament is protected from sideways stress.
It HARMS when it’s used for injuries it can’t hold: rotated fractures, mallet finger, boutonniere injuries and unstable dislocations.
When buddy strapping is the right choice
- Collateral ligament sprains, the sideways injury where a rigid splint causes more stiffness than it prevents
- Jammed fingers once a fracture and tendon injury have been ruled out
- Some stable finger and metacarpal fractures without rotation, as your clinician advises
- Return to sport after a sprain, for training and matches
When it’s the wrong choice
- A fingertip that droops: mallet finger needs a splint holding the end joint straight all day and night
- A middle joint that won’t straighten: a central slip injury needs a PIP extension splint
- A finger that crosses its neighbor when you make a fist: a rotated fracture that tape can’t correct
- A joint that dislocates again easily: PIP fracture-dislocations need an extension block splint or surgery
Buddy strapping supports a finger that’s sprained. It can’t hold one that’s broken out of line or has lost a tendon.
How to do it properly
- Tape the segments, not the joints. One strap between the knuckle and middle joint, one between the middle and end joint. Joints stay free to bend
- Put a thin pad between the fingers to stop sweat softening the skin
- Choose the neighbor on the injured side. A sprain on the side facing the middle finger gets taped to the middle finger, so that finger blocks the stress
- Snug, not tight. Fingers should stay pink and you should be able to slide a thin card under the tape
- Change it daily, and whenever it gets wet
How long
- Weeks 0 to 3: day and night for a sprain, with regular gentle bending and straightening
- Weeks 3 to 6: for activity and sport only
- Up to 3 months: for contact sport, while the ligament is still maturing. A PIP joint can stay thickened for months, and that alone doesn’t mean it’s still injured
Problems to watch for
- White, soft skin between the fingers
- The healthy finger stiffening from being taped for weeks
- Tape rolling into a tight band at the joint
- Swelling spilling above and below the tape
Get it checked if
- A finger crosses another when you make a fist
- A fingertip or middle joint won’t straighten on its own
- The joint wobbles sideways or keeps giving way
- Numbness, color change or pain getting worse after a week
This is one of dozens of supports a hand therapist uses.
See what a hand therapist does for the full list, and ball sport finger injuries for where many of these start.
Tape the segments, pad the gap, and rule out the injuries tape can’t hold.
Every article on this site is written using the Closing Window Method: name the window your condition runs on, find where you are in it, and act while it’s still open.