Ligament injuries/instabilities in the ankle joint

Quick Overview: What does ligament injury/instability mean?

Ligaments passively stabilize the ankle joint. During a sprain they are overstretched; With greater force, partial or complete cracks occur. If the ligament does not heal under load or if neuromuscular deficits remain, persistent instability can occur - the feeling of giving way.

• Common: lateral ligament complex (ATFL/anterior lateral ligament, CFL/calcaneus-fibula ligament)
• Less common: inner ligament (deltoid ligament) and syndesmosis (“high ankle sprain”)
• Acute vs. chronic: From fresh sprain to long-term functional or mechanical instability
• Therapy: Primarily functional-conservative; Surgery only if there is a clear indication

Anatomy: Ligaments of the upper ankle joint

The upper ankle joint (OSG) connects the tibia and fibula with the ankle bone (talus). Several ligament complexes secure the joint against tilting and shearing movements.

• Outer ligament complex: ATFL (anterior talofibular ligament), CFL (calcaneofibular ligament), PTFL (posterior outer ligament). Most commonly injured: ATFL.
• Inner ligament (deltoid ligament): Fan-shaped, strong complex on the inside; stabilizes against eversion forces.
• Syndesmosis: ligament connections between the tibia and fibula (AITFL, PITFL, interosseous membrane); important for fork stability.

Common ankle injury patterns

• Lateral distortion (supination/inversion): Typical “kneeling”, often affecting ATFL; Depending on the severity, grade I–III.
• Eversion injury: Rare inner ligament (deltoid) injury, possibly with bony avulsion.
• Syndesmosis injury (high ankle sprain): rotation/external rotation mechanism, pain over the joint fork.
• Combined injuries: Ligaments plus accompanying bony injuries (e.g. avulsion fractures).
• Chronic instability: repeated twisting, feeling unsteady, stress-related pain and swelling.

Symptoms and warning signs

• Acute: Sudden pain, swelling, bruising, tenderness over ligament attachments, possibly “cracking”.
• Functional: buckling, uncertainty, v. a. on uneven ground or when changing direction.
• Strain: Pain with exertion, jumping or running activities; Possibly irritating effusions after exercise.

Warning signs that should be checked by a doctor promptly:

• Severe pain and inability to take several steps or stand
• Significant misalignment, suspected fracture or dislocation
• Severe swelling with skin tension or numbness
• Open injury, wound over the joint

Diagnostics: Clinically sound, imaging targeted

The diagnosis is based on anamnesis, clinical examination and – depending on the findings – additional imaging. The aim is to reliably identify relevant ligament and associated injuries and to initiate adequate, if possible conservative, treatment.

• Clinic: Inspection, palpation of the ligament attachments, functional testing, stability tests (anterior drawer test, talar tilt), syndesmosis tests (squeeze, external rotation test).
• Functional status: gait, one-leg stance, proprioception, sport-specific requirements.
• X-ray: If a fracture is suspected, according to the Ottawa ankle rules, if necessary under weight; Detect avulsion fractures.
• Sonography: Dynamic assessment of ligament continuity and effusions.
• MRI: If the course is unclear, there is a high level of suspicion, persistent symptoms or surgery planning.
• CT: For complex bony concomitant injuries.

Not every sprain needs an immediate MRI. The decisive factors are clinical severity, loss of function and the course in the first few days.

Therapy: Functional and conservative first

The vast majority of ankle ligament injuries heal reliably with functional, early active therapy. The goal is to control swelling and pain, support healing of the ligamentous structures, and build neuromuscular control.

• Continue taping/orthosis in sports initially (several weeks).
• Manual therapy and myofascial techniques to optimize mobility.
• Training control: load management, sport specifics, prevention exercises.

Healing times vary: mild sprains often reach suitability for everyday use after 1-2 weeks, full exercise after 4-8 weeks. More serious injuries take significantly longer. Exercising too early increases the risk of recurrence.

Regenerative processes: supplementation with a sense of proportion

If symptoms persist or healing is delayed, additional measures can be considered. The evidence varies depending on the procedure, which is why individual indications and information are important.

• Biological injections (e.g. PRP): Discussed in cases of chronic ligamentous insufficiency or delayed healing; Study situation heterogeneous. May be considered as an adjunct to structured rehabilitation.
• Shock wave: more established for tendon insertion problems; in the case of belt problems only selectively.
• Supplementary orthosis/shoe concepts: To provide relief in the transition phase.

These options do not replace load-adaptive, active therapeutic rehabilitation. They can – if suitable – be integrated as a building block.

When does an operation make sense?

Surgical measures are reserved for selected situations - such as severe ligament ruptures with mechanical instability, bony avulsions with dislocation, severe syndesmosis injuries or persistent instability despite consistent conservative therapy.

• External ligament reconstruction/refixation (e.g. Broström-Gould, possibly internal brace): For persistent lateral instability.
• Deltoid ligament repair/recon: For significant medial instability.
• Syndesmosis stabilization: screw or suture-rein systems in cases of relevant diastasis-related instability.

Postoperatively, structured rehabilitation is crucial. Goals and expectation management are discussed individually in advance. Success cannot be guaranteed; Realistic goals are pain relief, increased stability and functional improvement.

Rehabilitation and recurrence prevention

• Proprioceptive training: wobble board, one-legged stand variations, reactive exercises.
• Strength/coordination: perones, calf muscles, hip stability for better leg axis.
• Sport-specific drills: change of direction, jump-landing technique, agility.
• External stabilization: taping/ankle support v. a. in the first few months after returning to sport.
• Footwear/surface: Suitable sports shoes, caution on uneven terrain.

Continuous prevention significantly reduces re-injuries. A structured program over several months is particularly worthwhile after an initial twisting injury.

Your orthopedic contact point in Hamburg

In our orthopedic practice at Dorotheenstrasse 48, 22301 Hamburg, we support you with acute sprains, ligament injuries and chronic ankle instability. Our approach: careful examination, targeted imaging only when indicated and an evidence-oriented therapy plan with a focus on functional rehabilitation.

• Acute care: initial care, functional stabilization (tape/orthosis), loading strategy.
• Physiotherapeutic concepts: coordination, strength, proprioception – individually tailored.
• Training and return advice: Criteria-based for everyday life, work and sport.
• Networking: If required, quick connection to radiology/surgeons from our network.

We would be happy to advise you personally – transparently, without promises of healing, with realistic goals.

Subpages and in-depth content

For detailed information on specific ankle ligament injuries and related topics, we recommend the following pages:

• External ligament tear (ATFL, CFL) - mechanisms, tests, conservative therapy and surgical indications (/diseases/ankle joint/ligament injuries-instabilities/external ligament tear-atfl-cfl/)
• Inner ligament injury - eversion injuries and deltoid ligament (/diseases/ankle joint/ligament injuries-instabilities/inner ligament injury-ankle/)
• Syndesmosis injury – high ankle sprain, stability diagnostics, therapy (/diseases/ankle joint/ligament injuries-instabilities/syndesmosis injury/)
• Distortions of the ankle joint - severity, first aid, course (/diseases/ankle joint/ligament injuries-instabilities/distortions-ankle joint/)
• Functional chronic ankle instability - causes, rehabilitation, prevention (/diseases/ankle/ligament-injuries-instabilities/chronic-ankle-instability/)
• Muscles, tendons, ligaments, soft tissues – adjacent soft tissue topics (/diseases/ankle joint/muscles-tendons-ligaments-soft tissues/)
• Joint / cartilage – cartilage and articular surfaces of the ankle joint (/diseases/ankle joint/joint-cartilage/)
• Bones / Structure – bony stability and fractures (/diseases/ankle joint/bone-structure/)
• Soft tissues / bursa – bursitis and irritation (/diseases/ankle/soft-tissue-bursa/)
• Loading, incorrect loading, overloading – training and load management (/diseases/ankle joint/loading-incorrect loading-overloading/)
• Trauma – acute injuries to the ankle (/diseases/ankle/trauma/)
• Systemic / rheumatic – inflammatory causes of the ankle joint (/diseases/ankle joint/systemic-rheumatic/)
• Functional / chronic pain syndromes – complex ankle joint complaints (/diseases/ankle joint/functional-chronic/)

Everyday life and sport: What is allowed?

In the first few days after a sprain, pain-free everyday movements, short walking with a bandage/orthosis and isometric exercises are usually possible. Jogging, jumping and changing direction should only be permitted after clinical improvement, stable functional tests and in consultation with the therapy.

• Pain as a leading signal: no increase the following day.
• Increasing the load in stages: 10–20% per week, depending on tolerability.
• If in doubt, it is better to stabilize and train for a week longer than to start too early.