What is Mallet Finger?
Mallet Finger is a common injury that occurs when the tendon responsible for straightening the tip of the finger is damaged or torn. It usually results from a sudden force that bends the fingertip while it is actively being straightened, causing the fingertip to droop and making it difficult or impossible to fully extend the end joint (distal interphalangeal joint).
In some cases, the injury may involve a small fracture where a piece of bone is pulled away along with the tendon (bony mallet finger). Early diagnosis and proper splinting are essential to restore finger function and prevent permanent deformity.
At Physiotherapy Expert, we manage Mallet Finger using evidence-based rehabilitation, customized splinting, pain management, and progressive hand therapy to promote tendon healing, restore movement, and maximize hand function.
Understanding the Condition
Mallet Finger affects the extensor tendon that straightens the distal interphalangeal (DIP) joint, which is the joint closest to the fingertip.
- Extensor tendon of the fingertip
- Distal interphalangeal (DIP) joint
- Finger extension (straightening movement)
It is commonly associated with disruption or rupture of the extensor tendon at its insertion on the distal phalanx, sometimes accompanied by a small avulsion fracture.
Without appropriate treatment, the tendon may heal in a lengthened position, leading to permanent drooping of the fingertip and reduced hand function.
Types of Mallet Finger
Mallet Finger can present in different forms:
Tendinous Mallet Finger
- Injury involves only the extensor tendon
- No associated bone fracture
Bony Mallet Finger
- Small bone fragment is pulled away with the tendon
- Visible on X-ray
Open Mallet Finger
- Tendon injury associated with a cut or laceration
- May require surgical repair
Chronic Mallet Finger
- Injury remains untreated for several weeks
- May result in permanent deformity and stiffness
Understanding Severity and Functional Impact
Severity depends on the extent of tendon injury and joint involvement.
- Mild: Partial tendon injury with minimal fingertip drooping and mild pain.
- Moderate: Complete tendon rupture causing inability to actively straighten the fingertip and difficulty performing daily tasks.
- Severe: Tendon rupture associated with a displaced fracture or joint instability, leading to significant functional impairment and possible surgical intervention.
Early diagnosis and continuous splinting greatly improve recovery outcomes.
Common Causes of Mallet Finger
Mallet Finger is usually caused by sudden trauma that forcefully bends the fingertip while the finger is extended.
– Ball striking the fingertip
– Cricket, basketball, volleyball, and baseball injuries
– Finger caught in a closing door
– Heavy object striking the fingertip
– Machinery-related accidents
– Manual handling injuries
– Sudden forced bending of the fingertip
– Injury during everyday activities
Symptoms: Recognizing the Signs
Symptoms usually appear immediately after the injury.
At the Time of Injury
- Sudden pain at the tip of the finger
- Inability to actively straighten the fingertip
- Drooping of the fingertip
During Daily Activities
- Difficulty gripping objects firmly
- Weak pinch strength
- Difficulty writing, typing, or buttoning clothes
In Chronic Cases
- Persistent drooping of the fingertip
- Finger stiffness
- Reduced range of motion
Associated Signs
- Tenderness over the injured tendon
- Bruising around the fingertip
Diagnosis: Clinical Approach
At Physiotherapy Expert, diagnosis involves a multidisciplinary assessment:
- Clinical Examination: Assessment of finger position, tendon integrity, swelling, and active movement.
- X-ray Evaluation: Identifies associated fractures and assesses joint alignment.
- Functional Assessment: Evaluates grip strength, dexterity, and hand function.
- Follow-up Assessment: Monitors tendon healing and progress throughout rehabilitation.
Early diagnosis is essential to achieve optimal healing and prevent permanent deformity.
Therapy & Management: 12-Week Structured Program
Management focuses on protecting the tendon, restoring finger movement, improving hand function, and preventing complications.
Phase 1: Protection & Healing (Weeks 1–4)
Goals:Protect the injured tendon, reduce pain and swelling, and promote tendon healing.
Interventions:
- Continuous extension splinting of the fingertip
- Pain and swelling management
- Hand positioning education
Phase 2: Controlled Rehabilitation (Weeks 4–8)
Goals: Restore controlled finger mobility while maintaining tendon healing.
Key interventions:
- Supervised range-of-motion exercises
- Tendon gliding exercises
- Functional hand movement training
Phase 3: Functional Recovery & Strengthening (Weeks 8–12)
Goals: Restore strength, coordination, and normal hand function.
Training includes:
- Grip strengthening exercises
- Pinch strengthening
- Fine motor coordination training
Advanced Therapy Techniques
- Custom thermoplastic splinting
- Tendon gliding exercises
- Hand therapy rehabilitation
- Functional movement retraining
Potential Complications
If not treated appropriately, Mallet Finger may lead to:
- Permanent fingertip drooping
- Swan neck deformity
- Chronic finger stiffness
- Persistent pain
FREQUENTLY ASKED QUESTIONS
Yes. Most Mallet Finger injuries heal successfully with continuous splinting for 6–8 weeks followed by structured physiotherapy and hand rehabilitation.
Surgery may be recommended if there is a large displaced fracture, joint instability, an open tendon injury, or when conservative treatment fails.
The splint should remain in place continuously as advised by your healthcare provider. Even brief removal that allows the fingertip to bend may delay tendon healing.
Most patients experience significant improvement within 8–12 weeks, although complete recovery of strength and function may continue for several months.
RELATED CONDITIONS
- Flexor Tendon Injury
- Swan Neck Deformity
- Finger Sprain
