Phalanx fractures are the second most common upper extremity fracture and among the most frequent reasons for ED visits related to hand trauma. [1-2] The distal phalanx is most commonly affected (~43%), followed by the proximal and middle phalanges. [2] Approximately 74% are managed conservatively; only ~26% require surgical intervention. [2] The following is a comprehensive clinical summary organized for emergency medicine and primary care workflows.
1. History
- Mechanism of injury: Crush injury (most common, ~33%), fall (~23%), direct blow, axial load, sports-related (ball-striking, jersey pull), or machinery/door-slam [2-3]
- Symptom characterization: Pain, swelling, deformity, ecchymosis, loss of grip/pinch function
- Timing: Acute onset with trauma; delayed presentations may indicate missed fracture or tendon injury
- Specific patterns to elicit:
- Forced flexion of extended DIP → mallet finger (extensor tendon avulsion) [3]
- Forced extension of flexed DIP → jersey finger (FDP avulsion); ask about grabbing a jersey/clothing [3]
- Crush to fingertip → distal tuft fracture; ask about subungual hematoma [3]
- Hand dominance, occupation, and sport involvement are critical for management planning
2. Alarm Features
- Open fracture (laceration communicating with fracture, nail bed disruption, or subungual hematoma with underlying fracture — consider open until proven otherwise) [3-4]
- Malrotation — overlap deformity when making a fist; requires surgical referral [3]
- Inability to flex DIP (jersey finger) — requires expedited surgical referral within 7–10 days [3]
- Inability to extend DIP with >30% articular involvement (complex mallet) [3]
- Neurovascular compromise — loss of distal sensation, absent capillary refill
- Significant angulation (>10–15°), displacement (>4 mm), or intra-articular step-off [3][5]
- Seymour fracture (pediatric) — open physeal fracture of distal phalanx with nail bed laceration; high infection risk (~62% complication rate) [6]
3. Medications
- Analgesia: NSAIDs (ibuprofen 400–600 mg PO q6h, naproxen 500 mg PO q12h) are first-line; acetaminophen as adjunct
- Digital nerve block: 1–2% lidocaine without epinephrine (traditional teaching), though evidence supports safe use of lidocaine with epinephrine in digital blocks [7-8]
- Techniques: dorsal web space block, volar subcutaneous block, transthecal block, or ring block [7]
- Dorsal approach preferred for dorsal injuries; volar approach for volar injuries [8]
- Open fractures: Prophylactic antibiotics (first-generation cephalosporin); tetanus prophylaxis as indicated
- Avoid: Excessive opioid prescribing for isolated finger fractures
4. Diet
- No specific acute dietary modifications required
- Adequate calcium and vitamin D intake supports fracture healing long-term
- Smoking cessation counseling — smoking impairs fracture healing and increases infection risk [10]
5. Review of Systems
- MSK: Pain with grip, pinch, or range of motion; stiffness; weakness
- Neuro: Numbness or tingling distal to injury (digital nerve injury)
- Vascular: Color changes, cold digit, delayed capillary refill
- Skin/soft tissue: Lacerations, nail bed disruption, wound drainage (if delayed presentation)
- Constitutional: Fever (concern for infection in open fractures or delayed presentations)
6. Collateral History and Family History
- Witness account of mechanism (especially in pediatric patients, elderly, or non-verbal patients)
- In children: assess for non-accidental trauma if mechanism inconsistent with injury pattern
- Occupational demands (manual labor, musician, typist) — impacts treatment aggressiveness and return-to-work planning
- Family history generally not contributory unless underlying bone disease (e.g., osteogenesis imperfecta)
7. Risk Factors
- Contact sports (basketball, football, rugby) — peak incidence ages 10–14 in pediatrics [11]
- Occupational exposure: machinery, construction, manual labor
- Crush mechanisms: doors, heavy objects
- Osteoporosis or metabolic bone disease (lower-energy fractures in elderly)
- Male sex (M:F ratio ~2.7:1) [2]
- Mean age ~40 years in adults [2]
8. Differential Diagnosis
- Metacarpal fracture — more proximal tenderness, different deformity pattern
- PIP/DIP joint dislocation — obvious deformity at joint line; may coexist with fracture
- Tendon rupture without fracture (mallet finger or jersey finger without bony avulsion)
- Collateral ligament sprain/tear — lateral joint instability, stress testing positive
- Volar plate injury — hyperextension mechanism, volar PIP tenderness
- Soft tissue contusion — no fracture on imaging, preserved ROM
- Septic joint (if delayed presentation with warmth, erythema, effusion)
- Gamekeeper's/skier's thumb (UCL injury of thumb MCP) — if thumb involved
9. Past Medical History
- Prior hand/finger fractures or surgeries
- Diabetes (impaired healing, infection risk)
- Peripheral vascular disease
- Rheumatoid arthritis or other inflammatory arthropathy
- Osteoporosis
- Anticoagulant use (increased hematoma risk)
- Immunosuppression (infection risk with open fractures)
10. Physical Exam
- Inspection: Swelling, ecchymosis, deformity, rotational malalignment, subungual hematoma, open wounds, nail bed disruption
- Palpation: Point tenderness over fracture site; assess each phalanx individually
- Malrotation assessment (critical): Have patient make a fist — all fingertips should point toward the scaphoid tubercle; overlap = malrotation requiring referral [3][12]
- Range of motion: Active flexion/extension at DIP, PIP, and MCP joints
- Inability to actively flex DIP → jersey finger [3]
- Extensor lag at DIP → mallet finger [3]
- Neurovascular exam: Two-point discrimination (normal <6 mm), capillary refill (<2 sec), Allen test if vascular concern
- Tendon testing: FDS (hold adjacent fingers in extension, flex PIP), FDP (hold PIP in extension, flex DIP)
- Skin integrity: Any wound communicating with fracture = open fracture
11. Lab Studies
- Routine labs are not indicated for isolated closed phalanx fractures
- If open fracture with concern for infection (delayed presentation): CBC, CRP, ESR
- Pre-operative labs if surgical intervention planned (per institutional protocol)
- Wound cultures if signs of infection
12. Imaging
- First-line: AP, lateral, and oblique radiographs of the affected digit (3-view series) [3][13]
- Standard 3-view examination shows most fractures and dislocations [13]
- Assess for fracture pattern (transverse, oblique, spiral, comminuted), displacement, angulation, articular involvement, and associated dislocations
- Postreduction radiographs are mandatory after any reduction attempt [3]
- CT: Rarely needed; may be useful for complex intra-articular fractures to guide surgical planning
- MRI/Ultrasound: Not routinely indicated; ultrasound may help identify nail bed lacerations; MRI for occult fractures or soft tissue injury if clinical suspicion persists despite negative radiographs [4]
- Imaging is unnecessary for: clinical diagnosis of subungual hematoma alone (though radiographs are recommended to rule out underlying fracture) [4]
13. Special Tests
- Malrotation test: Fist-making with digital cascade assessment [3]
- Elson test: For central slip integrity (PIP held at 90° flexion over table edge; inability to extend PIP with DIP flaccidity = central slip rupture)
- FDP isolation test: Hold PIP extended, ask patient to flex DIP
- FDS isolation test: Hold all other fingers in extension, ask patient to flex PIP
- Subungual hematoma trephination: Electrocautery or 18-gauge needle through nail plate for decompression; safe regardless of hematoma size or presence of underlying fracture [14-15]
- Point-of-care ultrasound: Can identify fractures and nail bed lacerations at bedside [4]
14. ECG
- Not applicable for isolated phalanx fractures
- Consider if polytrauma or if procedural sedation is planned for reduction
15. Assessment
Phalanx fractures are classified by location (distal, middle, proximal), pattern (tuft, transverse, oblique, spiral, comminuted, avulsion), and involvement (extra-articular vs. intra-articular). [2][16] Key clinical subtypes:
- Distal phalanx tuft fracture: Most common; usually stable, from crush injury [2]
- Mallet finger: Dorsal avulsion at DIP; extensor lag at rest [3]
- Jersey finger: FDP avulsion; inability to flex DIP; surgical emergency [3]
- Middle/proximal phalanx shaft fractures: Deforming forces from intrinsic/extrinsic tendons create characteristic angulation patterns [17]
- Condylar fractures: Intra-articular; often unstable; high risk of malunion [17]
Complications include stiffness (most common after operative fixation), malunion/malrotation, nonunion, chronic pain/hyperesthesia, infection, tendon adhesions, and nail deformity. [3][6][18]
16. Treatment Plan
Distal phalanx fractures
- Tuft fractures: Protective splint (U-shaped aluminum, fingertip guard, or volar splint) with DIP in full extension for 4–6 weeks [3]
- Subungual hematoma: Nail trephination with electrocautery or heated needle for pain relief; safe even with underlying fracture [14-15]
- Mallet finger: Strict DIP splinting in full extension to slight hyperextension for 8 weeks; premature flexion prolongs recovery [3]
- Jersey finger: Splint PIP and DIP in slight flexion; expedited surgical referral (within 7–10 days) [3]
Middle/proximal phalanx fractures
- Stable, minimally angulated (<10°): Buddy taping for 3–4 weeks [3]
- Angulated/displaced (reducible): Digital block → closed reduction → ulnar or radial gutter splint → postreduction radiograph [3]
- Unstable patterns (oblique, spiral, rotational, intra-articular, >4 mm displacement, >15° angulation): Surgical referral [3][5]
Reduction technique: Apply longitudinal traction on the distal phalanx and guide the bone into alignment; requires digital block or hematoma block. [3]
Open fractures: Irrigation, wound care, prophylactic antibiotics, tetanus update, and hand surgery referral. [3-4]
17. Disposition
- Discharge (majority): Stable, closed, non-displaced or minimally angulated fractures after appropriate splinting with close follow-up [2]
- Referral to hand/orthopedic surgery (urgent/expedited):
- All jersey finger injuries [3]
- Open fractures [3]
- Malrotation [3]
- Intra-articular, oblique, spiral, or comminuted fractures [3]
- Failed closed reduction
- 30% articular surface involvement (mallet) [3]
- Neurovascular compromise
- Admission: Rarely needed; consider for polytrauma, open fractures requiring operative washout, or vascular compromise
18. Follow Up / Return Precautions
- Follow-up timing:
- Repeat radiographs at 7–10 days for reduced fractures to assess alignment [3]
- Follow-up every 2 weeks during healing [3]
- Healing typically takes 4–6 weeks (distal/middle/proximal shaft) or 6–10 weeks (mallet finger) [3]
- Return precautions — seek immediate reassessment for:
- Increasing pain, swelling, or numbness despite splinting
- Signs of infection (redness, warmth, drainage, fever)
- Splint becoming loose or digit appearing rotated
- Inability to move finger after splint removal
- Patient counseling:
- Keep splint dry and intact; do not remove mallet splint (premature flexion resets the clock) [3]
- Buddy-taped fingers should be mobilized gently to prevent stiffness
- Expected recovery: most uncomplicated fractures heal well with conservative management; stiffness is the most common long-term issue and improves with hand therapy
- Smoking cessation strongly recommended to optimize healing
References
1. An Evidence-Based Guide for Managing Phalangeal Fractures. — Ganesh Kumar N, Chung KC. Plastic and Reconstructive Surgery. 2021.
2. Epidemiology and Treatment of Phalangeal Fractures: Conservative Treatment Is the Predominant Therapeutic Concept. — Kremer L, Frank J, Lustenberger T, Marzi I, Sander AL. European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society. 2022.
3. Common Finger Fractures and Dislocations. — Childress MA, Olivas J, Crutchfield A. American Family Physician. 2022.
4. Fingertip Injuries. — Hilgefort J, Becker J, Chu J. American Family Physician. 2025.
5. Analysis of 1430 Hand Fractures and Identifying the 'Red Flags' for Cases Requiring Surgery. — Üstün GG, Kargalıoğlu F, Akduman B, et al. Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS. 2022.
6. Complications of Distal Phalanx Fractures in Children. — Lankachandra M, Wells CR, Cheng CJ, Hutchison RL. The Journal of Hand Surgery. 2017.
7. Digital Nerve Blocks: A Comprehensive Review of Techniques. — Gottlieb M, Penington A, Schraft E. The Journal of Emergency Medicine. 2022.
8. Regional Anaesthesia on the Finger: Traditional Dorsal Digital Nerve Block Versus Subcutaneous Volar Nerve Block, a Randomized Controlled Trial. — Clement P, Doomen L, van Hooft M, Hessels R. Injury. 2021.
9. Peripheral Nerve Blocks for Hand Procedures. — Chandrasoma J, Harrison TK, Ching H, Vokach-Brodsky L, Chu LF. The New England Journal of Medicine. 2018.
10. Osteomyelitis: Diagnosis and Treatment. — Bury DC, Rogers TS, Dickman MM. American Family Physician. 2021.
11. Pediatric Phalanx Fractures. — Abzug JM, Dua K, Bauer AS, Cornwall R, Wyrick TO. The Journal of the American Academy of Orthopaedic Surgeons. 2016.
12. The Community Orthopaedic Surgeon Taking Trauma Call: Pediatric Phalangeal Fracture Pearls and Pitfalls. — Abzug JM, Mehlman CT. Journal of Orthopaedic Trauma. 2017.
13. ACR Appropriateness Criteria Acute Hand and Wrist Trauma. — Expert Panel on Musculoskeletal Imaging:, Torabi M, Lenchik L, et al.' Journal of the American College of Radiology : JACR. 2019.
14. Current Management of Acute Cutaneous Wounds. — Singer AJ, Dagum AB. The New England Journal of Medicine. 2008.
15. Treatment of Subungual Hematomas With Nail Trephination: A Prospective Study. — Seaberg DC, Angelos WJ, Paris PM. The American Journal of Emergency Medicine. 1991.
16. Fractures of the Phalanges. — Heifner JJ, Rubio F. The Journal of Hand Surgery, European Volume. 2023.
17. Fractures of the Proximal Phalanx and Metacarpals in the Hand: Preferred Methods of Stabilization. — Henry MH. The Journal of the American Academy of Orthopaedic Surgeons. 2008.
18. Complications and Range of Motion Following Plate Fixation of Metacarpal and Phalangeal Fractures. — Page SM, Stern PJ. The Journal of Hand Surgery. 1998.