Hand Pain and Swelling After Proximal Humerus Fracture
This represents a potential complication requiring immediate neurovascular assessment and imaging to exclude compartment syndrome, complex regional pain syndrome (CRPS), or distal fracture propagation—obtain immediate hand and wrist radiographs (3-view series) and assess for vascular compromise.
Immediate Clinical Assessment
The hand pain and swelling following proximal humerus fracture is concerning for several specific complications that require urgent evaluation:
Critical Neurovascular Examination
- Check radial and ulnar pulses - diminished or absent pulses suggest vascular injury
- Assess capillary refill - should be <2 seconds in all digits
- Test median, ulnar, and radial nerve function - specific motor and sensory testing in each distribution
- Measure compartment pressures if clinical suspicion exists - pressures >30 mmHg or within 30 mmHg of diastolic pressure indicate compartment syndrome
- Evaluate for axillary nerve injury at the shoulder level, as this commonly accompanies proximal humerus fractures 1
Imaging Protocol
Obtain immediate 3-view hand and wrist radiographs including posteroanterior, lateral, and 45-degree semipronated oblique views 2. This is the appropriate initial imaging for any suspected hand/wrist trauma and will identify:
- Occult distal radius or carpal fractures
- Metacarpal or phalangeal fractures
- Joint dislocations
If initial radiographs are negative but clinical suspicion remains high, proceed directly to CT without IV contrast rather than waiting 10-14 days for repeat films 2. CT is superior for detecting occult fractures and evaluating intra-articular extension.
Differential Diagnosis and Management
Complex Regional Pain Syndrome (CRPS)
This is a common complication after upper extremity fractures presenting with:
- Disproportionate pain relative to examination
- Swelling and skin changes (temperature, color)
- Limited range of motion
Management: Early aggressive physical therapy, pain control, and possible referral to pain management for sympathetic blocks if conservative measures fail.
Compartment Syndrome
Though rare in the hand after proximal injury, this is limb-threatening:
- Severe pain with passive stretch
- Tense compartments
- Progressive neurologic deficit
Management: Immediate fasciotomy if diagnosed—do not delay for imaging.
Venous Thrombosis or Lymphatic Obstruction
Immobilization and positioning can cause dependent edema:
- Check for Homans sign
- Assess for unilateral limb swelling
Management: Elevation, compression, early mobilization; consider duplex ultrasound if DVT suspected.
Referred Pain from Shoulder Pathology
The proximal humerus fracture itself may cause referred pain:
- Assess fracture stability and alignment
- Review initial shoulder imaging
Treatment Algorithm
- Emergency assessment (within 1 hour): Neurovascular exam, compartment assessment
- Immediate imaging (within 4 hours): 3-view hand/wrist radiographs 2
- If radiographs negative: CT without contrast to exclude occult fracture 2
- If all imaging negative: Treat as CRPS or soft tissue injury with elevation, ice, early gentle range of motion, and close follow-up
- If fracture identified: Treat according to fracture pattern per standard protocols 2
Common Pitfalls
- Delaying imaging: Do not wait 10-14 days for repeat radiographs when CT is immediately available and more sensitive 2
- Inadequate views: Two-view radiographs miss significant fractures—always obtain three views minimum for wrist/hand 2
- Dismissing symptoms: Hand swelling after proximal injury is abnormal and requires investigation, not reassurance alone
- Missing compartment syndrome: This is a clinical diagnosis—do not delay fasciotomy for imaging if clinically evident
The key is rapid systematic evaluation to identify treatable causes, as delayed diagnosis of compartment syndrome, vascular injury, or displaced fractures significantly worsens outcomes and quality of life.