A finger injury can sometimes look surprisingly minor at first.
You may have little more than swelling or tenderness around the fingertip after catching a ball, bumping the finger against an object or simply jamming it during everyday activity.
But if the end of the finger suddenly begins to droop and you can no longer straighten it normally, the injury may be a mallet finger.
Mallet finger is an injury to the tendon responsible for straightening the end joint of the finger. In some cases, the tendon itself is damaged. In others, the tendon pulls away a small piece of bone where it attaches.
Although it may not always be particularly painful, correct early management is important because the tendon needs time to heal in the appropriate position.
What Is Mallet Finger?
The tendon running along the back of the finger allows you to straighten the fingertip at the distal interphalangeal joint, commonly called the DIP joint.
A mallet finger injury occurs when this tendon is suddenly overstretched or torn.
Sometimes the force also causes an avulsion fracture, where a small piece of bone is pulled away with the tendon.
The characteristic sign is a fingertip that hangs downward and cannot be actively straightened.
You may be able to push the finger straight using your other hand, but once you let go, the fingertip drops again.
How Does Mallet Finger Happen?
Sports are a common cause.
A ball striking the end of an extended finger can suddenly force the fingertip downward while the tendon is attempting to keep it straight.
This is why mallet finger is frequently associated with sports such as:
- Basketball
- Baseball
- Volleyball
- Rugby
- Cricket
However, significant force is not always required.
Mallet finger can also occur during ordinary activities such as catching the finger on clothing, bedding or another object.
Cambridge University Hospitals notes that the injury may result from relatively minor trauma and can involve either the tendon itself or a small associated fracture. Their mallet finger treatment guidance also explains the typical splinting and rehabilitation process.
What Are the Symptoms?
The most recognizable symptom is the appearance of the fingertip.
Common features include:
- Drooping of the end joint
- Difficulty actively straightening the fingertip
- Swelling
- Bruising
- Tenderness
- Pain around the end joint
Interestingly, some mallet finger injuries are not especially painful.
This can make people underestimate the injury, particularly if they are still able to move the rest of the finger normally.
Why Assessment Matters
A mallet finger injury can involve either the tendon alone or both the tendon and bone.
An assessment helps determine what type of injury has occurred and whether additional investigation, such as an X-ray, may be appropriate.
Imaging can help identify an avulsion fracture and determine whether the joint position has been affected.
This is also important because not every painful or swollen fingertip is a mallet finger. Fractures, dislocations and other tendon injuries can sometimes produce overlapping symptoms.
The Most Important Treatment Is Usually Splinting
Unlike many musculoskeletal injuries where gradually restoring movement begins relatively early, mallet finger requires a period during which the injured end joint must remain straight.
A splint is typically used to hold the DIP joint in extension while allowing the rest of the finger to continue moving.
For many injuries, this means wearing the splint continuously for approximately six to eight weeks, depending on whether the injury involves bone or primarily the tendon.
The exact treatment duration should be determined by the healthcare professional managing the injury.
Why Continuous Splinting Is So Important
One of the unusual features of mallet finger rehabilitation is how important it is to keep the fingertip straight during the healing period.
If the injured tendon is repeatedly allowed to stretch by bending the fingertip, healing can be disrupted.
Cambridge University Hospitals advises that the end joint needs to remain supported when the splint is removed for cleaning. Allowing it to bend prematurely can affect healing and may mean the splinting period needs to restart.
That makes proper splint use much more than simply wearing a brace most of the day.
Consistency matters.
The Rest of the Finger Should Still Move
Keeping the injured joint straight does not mean immobilizing the entire hand.
A correctly fitted splint should usually allow movement of the middle finger joint and the unaffected joints.
Maintaining movement in these areas helps reduce unnecessary stiffness while the injured tendon heals.
A rehabilitation professional may therefore provide exercises for the uninvolved joints while protecting the injured fingertip.
Splint Fit Matters
Not every off-the-shelf finger splint fits every hand well.
The splint needs to hold the end joint in the required position without unnecessarily restricting the rest of the finger.
If it is too loose, the fingertip may begin to bend.
If it is too tight, it may irritate the skin or affect circulation.
In some cases, a custom-made thermoplastic splint may be recommended to achieve a more appropriate fit.
Skin Care During Splinting
Because the splint may need to be worn continuously for several weeks, skin care becomes an important part of treatment.
The finger and splint generally need to be cleaned regularly.
During this process, however, the injured joint still needs to remain supported in the straight position.
Keeping the skin dry and checking for pressure areas can help reduce irritation associated with prolonged splint use.
If the splint becomes uncomfortable, damaged, excessively loose or tight, it should be reassessed rather than simply abandoned.
What Happens After the Splint Comes Off?
After several weeks of immobilization, it can be tempting to immediately start bending the finger normally.
Rehabilitation usually needs to be more gradual.
Depending on healing, a therapist may introduce carefully controlled movement while continuing protective splinting between exercises.
The splint may then gradually be worn less frequently, followed by nighttime or activity-specific use for a further period.
Cambridge University Hospitals’ rehabilitation programme describes a staged transition from full-time splinting to controlled movement and eventually normal use of the hand.
Why the Finger May Feel Stiff
Stiffness after splinting is not unusual.
The joint has spent several weeks deliberately being prevented from bending, so movement may initially feel restricted.
There may also still be:
- Swelling
- Tenderness
- Reduced strength
- Skin sensitivity
- Difficulty coordinating fine hand movements
These symptoms can gradually settle as movement and normal use are reintroduced.
Rehabilitation After Mallet Finger
Once the tendon or fracture has healed sufficiently, rehabilitation can focus on restoring useful movement and function.
Depending on the individual, this may involve:
- Gradual range-of-motion exercises
- Hand and finger strengthening
- Grip exercises
- Swelling management
- Functional exercises
- Advice about returning to sport or work
The important point is that rehabilitation needs to respect the healing tendon.
Aggressive stretching too early is not appropriate simply because the finger feels stiff.
Returning to Sport
Athletes frequently want to know when they can return to sport after mallet finger.
The answer depends on the type of injury, stage of healing and sport involved.
Some activities may be possible while the finger remains protected in a suitable splint, while sports carrying a greater risk of impact to the hand may require additional precautions.
Later-stage rehabilitation may involve grip work, catching, throwing or other activity-specific exercises before returning fully.
Will the Finger Look Completely Normal Again?
Most people recover good hand function following appropriate treatment.
However, a small residual droop at the fingertip can sometimes remain even after treatment.
Cambridge University Hospitals notes that a slight loss of full extension may persist for some people despite otherwise satisfactory recovery.
The practical outcome — comfortable use, grip and hand function — can therefore sometimes be more important than achieving a perfectly straight-looking fingertip.
When Might Surgery Be Considered?
Most mallet finger injuries are managed without surgery.
However, specialist assessment may be required when there is:
- A larger fracture
- Significant joint displacement
- Joint instability
- An open injury
- Failure of appropriate conservative treatment
- A more complex associated injury
The appropriate treatment depends on the precise nature of the injury rather than the appearance of the fingertip alone.
When Should You Get a Drooping Finger Assessed?
An assessment is worthwhile if the fingertip suddenly droops after an injury and you cannot actively straighten it.
Early assessment can help establish whether there is a tendon injury, fracture or another condition requiring treatment.
People seeking mallet finger treatment in Vancouver can access assessment and rehabilitation at Northwest Rehab Group’s multidisciplinary clinic in Mount Pleasant.
Depending on the injury and stage of healing, management may include education, appropriate splinting guidance and progressive rehabilitation aimed at restoring finger movement, strength and practical hand function.
The exact treatment plan should depend on the individual’s presentation and the nature of the injury rather than using the same programme for every patient.
Protect First, Rehabilitate Second
Mallet finger is a good example of why every injury should not be treated with immediate stretching and movement.
During the early phase, protecting the injured tendon in the correct position is often the priority.
Once sufficient healing has occurred, rehabilitation can progressively restore movement and normal hand function.
Recognizing the injury early, using the splint correctly and following an appropriate progression back to activity can make a meaningful difference to the eventual result.