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Female 59 yrs old. Fractured lower right fibula. This xray after 6 weeks of casting. Since then its been 1 month. Pain decreased gradually. But swelling around ankle joint is not subsiding. Its been more than 2 months.
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persistent ankle swelling after fibula fracture cast removal 2 months causes management
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X-Ray Analysis - Manju Kumari, 59F, Right Ankle (Dated July 5, 2026)
What the X-Ray Shows
The two views (AP and Oblique/OBQ) reveal:
- Distal fibula (lateral malleolus) fracture - with visible callus formation and periosteal reaction, indicating active but ongoing bony union. The fracture line is still partially visible at ~10 weeks post-injury, which is expected and not a sign of non-union at this stage.
- Ankle mortise alignment is preserved - the talus is well-centered, no medial clear space widening, syndesmosis appears intact. This is a good sign - it means the fracture is stable.
- Disuse osteopenia - patchy, mottled decreased bone density throughout the tarsal bones, tibia, and fibula. This is a normal, expected consequence of 6 weeks of immobilization and will gradually improve with weight-bearing.
- Soft tissue swelling is visible on the radiograph.
- Mild early degenerative changes in keeping with age (59 years).
Conclusion from X-ray: The fracture is healing in good alignment. No signs of non-union, hardware failure (no implants used), or major joint disruption.
Why Is the Swelling Persisting?
Swelling after ankle fracture and cast removal is extremely common and can normally last 6 to 9 months - this is well-documented. Multiple mechanisms are at play:
| Mechanism | Explanation |
|---|---|
| Disuse/immobilization edema | 6 weeks in a cast impairs lymphatic drainage and venous return. Fluid accumulates in dependent tissues. |
| Muscle atrophy | The calf muscle pump is weakened; it normally squeezes fluid back up. Wasting from immobility reduces this effect. |
| Inflammatory phase | The fracture healing process (especially callus remodeling at ~10 weeks) continues to generate local inflammatory mediators. |
| Lymphatic disruption | Trauma and immobilization disrupt local lymphatic drainage channels. |
| Dependent positioning | If the foot is often in a dependent (hanging down) position during the day, gravity worsens edema. |
The fact that pain has decreased gradually while swelling persists is actually a reassuring pattern - it suggests the swelling is from the physiological recovery process rather than a complication.
Red Flags to Watch For (Reassess if Any Are Present)
- Deep Vein Thrombosis (DVT) - Ankle fractures carry DVT risk. Urgent Doppler ultrasound needed if: sudden increase in swelling, calf pain, warmth, skin redness/discoloration.
- Complex Regional Pain Syndrome (CRPS/RSD) - If she develops burning pain, skin color/temperature changes, shiny skin, excessive sweating, or hypersensitivity to touch - this needs specialist evaluation promptly.
- Infection - Fever, hot joint, increasing (not decreasing) pain.
- Malunion/non-union - Pain on weight-bearing that is not improving; the X-ray doesn't suggest this, but a repeat X-ray at 3 months from injury (coming up soon) would be confirmatory.
None of these red flags seem to be present based on your description (gradual decrease in pain, persistent but stable swelling).
What Should Be Done Now
Conservative management is appropriate at this stage:
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Elevation - Whenever resting, keep the foot elevated above heart level (on 2-3 pillows). This is the single most effective intervention for post-fracture ankle edema.
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Compression stockings - A graduated compression stocking (Class I or II, 15-20 mmHg) worn during the day significantly reduces dependent edema. Remove at night.
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Physiotherapy/exercises - Active ankle range-of-motion exercises 3-4 times daily:
- Ankle pumps (dorsiflexion/plantarflexion) - 20 reps
- Ankle circles - 10 each direction
- Calf stretches
- Toe raises (as tolerated)
- The calf muscle pump is the most powerful driver of venous return from the ankle.
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Progressive weight-bearing - Gentle walking with supportive footwear helps activate the muscle pump. Avoid prolonged standing or sitting with the foot dependent.
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Cold therapy - Ice pack wrapped in cloth for 10-15 minutes, 2-3 times daily can reduce inflammatory swelling.
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Nutritional support - Adequate protein and vitamin C (collagen synthesis), vitamin D and calcium (bone remodeling) are important for a 59-year-old woman with disuse osteopenia.
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Repeat X-ray at 12-14 weeks from injury (about 2-4 weeks from now) to confirm solid union.
When to Revisit the Orthopedic Surgeon
- Swelling not improving by 4-5 months post-injury
- Any sudden worsening of swelling or pain
- Inability to bear full weight at 3 months
- Development of any red flag symptoms listed above
Overall prognosis is good. Stable distal fibula fractures treated conservatively in this age group typically unite well. Persistent swelling at 2 months post-fracture is within the normal expected timeline. The key at this stage is active rehabilitation, not continued rest.
Disclaimer: This analysis is for informational purposes only. The treating orthopedic surgeon who has examined the patient directly should make all clinical decisions. Please follow up with them as scheduled.
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