Ankle Sprains

​Overview
Ankle sprains are among the most common musculoskeletal injuries, occurring when one or more ligaments around the ankle are stretched or torn. They often result from abrupt twisting, rolling, or inversion/eversion of the foot beyond its normal range of motion. While many sprains heal relatively well, a subset may progress to chronic instability, persistent pain, or recurrent injury.
Sprains are usually classified by grade (I, II, III) depending on severity of ligament damage and clinical findings.


Etiology & Risk Factors
Mechanism of Injury

• The most frequent mechanism involves inversion plus plantarflexion (rolling foot inward), damaging the lateral ligament complex (particularly the anterior talofibular ligament, or ATFL).
• Less commonly, eversion or external rotation injuries can damage the deltoid (medial) ligaments or the syndesmosis (high ankle ligaments).
• Concomitant injuries are possible, including cartilage lesions (osteochondral injury), bone bruising, tendon strain, or fractures near the ankle joint.

Risk & Prognostic Factors

• Prior ankle sprain or ligament laxity
• Poor neuromuscular control or balance
• Inadequate rehabilitation or premature return to activity
• Higher severity of initial injury, greater swelling, delayed weight bearing, older age have been associated with worse long-term outcome, though evidence is somewhat inconsistent.
• Up to ~70% of patients may develop lingering symptoms (pain, instability) after an ankle sprain.

Clinical Presentation & Diagnosis
Symptoms

• Immediate pain, often sharp at the time of injury
• Swelling, bruising, tenderness over involved ligaments
• Difficulty or inability to bear weight
• A “pop” or tearing sensation at the moment of injury (in more severe tears)
• In chronic or recurrent cases: instability (“giving way”), persistent ache, recurrent episodes of swelling

Examination & Tests

• Physical examination: palpation for ligament tenderness, assessment of swelling, joint alignment, range of motion, strength, and stability tests (e.g. anterior drawer test, talar tilt).
• Imaging:
   - Plain radiographs (X-rays) to rule out associated fractures or bone injury
   - Stress radiographs in select cases to assess ligament laxity
   - MRI or ultrasound to evaluate soft tissue damage, cartilage lesions, or associated injuries when needed

Classification (grade) helps guide treatment:
Grade
Description
Typical Findings
Grade I (Mild)
Partial stretching/microtear, intact stability
Mild swelling, minimal functional loss

Grade II (Moderate)
Partial tear with some laxity
Moderate swelling, bruising, pain with motion

Grade III (Severe)
Complete tear of ligament(s)
Significant swelling, instability, inability to bear weight


Treatment Approaches
Most ankle sprains are treated conservatively (non-operatively), especially Grades I and II. Surgical intervention is reserved for specific cases (e.g. complete tears, associated injuries, failure of conservative therapy).
Conservative Treatment

1. Protection, Rest, Ice, Compression, Elevation (PRICE / RICE) in the acute phase to reduce swelling and pain.
2. Functional support: Use of braces, ankle wraps, or elastic supports rather than rigid immobilization is often preferred to allow controlled motion. Multiple reviews suggest functional treatment is superior to prolonged casting.
3. NSAIDs / analgesics: For pain and inflammation control in early phases.
4. Physical therapy / rehabilitation: A structured program including range-of-motion exercises, strengthening (especially peroneal and calf muscles), proprioceptive/balance training, and gradual sports-specific progression.
5. Progressive return to weight-bearing and activity: Early mobilization (as tolerated) is generally beneficial compared to long immobilization.
6. Bracing / taping during return to activity to reduce risk of re-injury.

Surgical Treatment
Surgery (ligament repair or reconstruction) may be indicated when:

• Grade III injury with significant instability
• Associated injuries (e.g., osteochondral lesion, syndesmotic injury, large bone avulsion)
• Recurrent instability despite proper conservative therapy
• Failed rehabilitation and persistent symptoms interfering with function

Surgical techniques include primary repair (e.g. modified Broström procedure), augmentation (e.g. using grafts), or reconstruction via ligament grafts, sometimes combined with realignment or osteotomy in complex cases.
Rehabilitation after surgery proceeds in phases: immobilization followed by protected motion, gradually increased loading, and return to full activity over months.


Prognosis & Expectations

• Many patients recover well with conservative care, but a notable proportion (25–70 %) may develop residual symptoms such as pain, swelling, or instability.
• Recovery timeline:
   - Pain & swelling reduction: days to weeks
   - Return to normal daily activities: several weeks
   - Full athletic / sport participation: often 8–12+ weeks (sometimes longer depending on severity)
• Long-term risks: Persistent instability, chronic pain, osteochondral damage, early degenerative changes (post-traumatic arthritis) if injuries are severe or repeated.
• Prognostic factors for poorer recovery include older age, greater initial injury severity, significant swelling, delayed weight-bearing, restricted motion, and multiple ligament involvement, though evidence is not fully conclusive.
• One study notes that 50–85% of individuals with a lateral ankle sprain report full recovery by 3 years, regardless of initial severity.

Key Messages for Patients

• Early, appropriate management and a structured rehabilitation program are vital for optimal healing and reducing the risk of chronic complications.
• Avoid prolonged immobilization unless absolute instability requires it—controlled movement and strengthening help recovery.
• Be cautious when returning to sport or high-risk activities; consider bracing or taping during this period.
• Seek medical evaluation if symptoms worsen, do not improve over expected time, or you experience repeated “giving-way” episodes.

Selected References

1. Lin CWC, Westerberg MC. Evidence-based treatment for ankle injuries: a clinical review. PMCID. 2010.
2. Gaddi D, et al. Acute Ankle Sprain Management: An Umbrella Review. PMCID. 2022.
3. Ferreira JN, et al. Prognostic factors in ankle sprains: a review. EFORT Open Rev. 2020.
4. Thompson JY, et al. Prognostic factors for recovery following acute lateral ankle sprain: a systematic review. BMC Musculoskelet Disord. 2017.
5. Pantalone A, et al. Management strategies for ankle sprains: a narrative review. JOINTS. 2024.
6. Ortega-Avila AB, et al. Conservative Treatment for Acute Ankle Sprain: A Systematic Review. J Clin Med. 2020.