An ankle that still hurts months after a sprain is not necessarily just a weak ankle. Persistent symptoms may come from residual ligament injury, mechanical instability, altered sensorimotor control, anterior impingement, osteochondral injury, tendon pathology, joint restriction or a combination of these problems.
At our Denver Tech Center clinic, Dr. Scott King first determines what is actually limiting the ankle. The examination assesses pain location, swelling, ligament stability, episodes of giving way, ankle dorsiflexion, anterior joint pinching, tendon loading, balance and functional control. When the presentation suggests cartilage, bone, syndesmotic or other structural pathology, imaging or referral may be appropriate.
Treatment is then selected according to the diagnosis and may include progressive ankle rehabilitation, balance and strength work, manual treatment for selected mechanical restrictions, bracing where appropriate, and shockwave therapy only when the target tissue and evidence fit the diagnosis.
A chronically painful ankle and a mechanically unstable ankle are not the same problem, and an ankle can have both. Diagnosis comes first; treatment comes second.
Where Is the Ankle Pain?
Ankle pain should be localized before it is treated. A painful ligament, an unstable ligament, an impinged joint and an osteochondral lesion require different management.
- Lateral, in front of and below the ankle bone: ATFL or CFL injury, the sinus tarsi, or joint and osteochondral pathology.
- Behind the outside ankle bone: the peroneal tendons.
- Front of the ankle: anterior impingement from soft tissue or osteophytes, talar dome pathology, joint synovitis or the tibialis anterior tendon.
- Above the ankle joint, between the shin bones: the syndesmosis, injured in a high ankle sprain.
- Back of the ankle: the Achilles tendon, posterior impingement, the flexor hallucis longus or the joint.
- Inside of the ankle: the posterior tibial tendon, the deltoid ligament or the medial joint.
Seek prompt evaluation if you cannot bear weight after an ankle injury, have bone tenderness, marked swelling or deformity, pain above the ankle between the shin bones after a twisting injury, a locking or catching joint, sudden loss of push-off strength, progressive numbness, or a hot, red, swollen ankle with fever. Suspected fracture, high-grade syndesmotic injury or tendon rupture needs imaging or orthopedic care, not routine rehabilitation or shockwave.
Prior Sprain Is History, Not a Diagnosis
A history of an ankle sprain explains how symptoms may have started; it does not by itself identify what is causing pain today. In a surgical series of 179 patients with chronic lateral ankle instability, more than half also had intra-articular lesions, most often soft-tissue impingement and osteochondral lesions, and the preoperative diagnosis often did not match what arthroscopy found (Vermorel, 2026).
The ATFL and CFL
The anterior talofibular ligament (ATFL) runs from the front of the fibula to the talus. The calcaneofibular ligament (CFL) runs from the tip of the fibula down to the calcaneus and contributes to lateral stability across different ankle positions. The posterior talofibular ligament is less commonly injured in a typical inversion sprain.
The ATFL is the ligament most commonly injured during a lateral ankle sprain, while the CFL becomes increasingly important when the injury is more substantial or instability persists. Read more in ATFL and CFL injury and chronic ankle instability.
Chronic Ankle Instability
Chronic ankle instability is broader than ligament laxity. Some patients have true mechanical instability, while others experience recurrent giving way because of deficits in neuromuscular control, balance or confidence. An updated model describes it as recurrent sprains, frequent episodes or perceptions of giving way, and persistent symptoms more than 12 months after the first sprain, driven by interacting mechanical, sensory and motor impairments (Hertel, 2019).
Chronic ankle instability is not the same as chronic ankle pain. A patient may have pain without instability, or instability with little pain.
Anterior Ankle Impingement
Anterior impingement is a compression problem at the front of the ankle, usually provoked by loaded dorsiflexion in a squat, lunge, stairs or running. It may be soft-tissue dominant, typically at the front and outside of the ankle, or osteophyte dominant, typically at the front and inside (Yang, 2026). It is not the same thing as ligament instability, although the two can coexist. See anterior ankle impingement vs chronic ankle instability.
Painful or limited dorsiflexion is a finding, not a diagnosis. Calf and soleus restriction, joint stiffness after immobilization, pain inhibition, a talar injury and arthritis can all limit dorsiflexion.
Other Causes That Mimic Chronic Sprain Pain
- Osteochondral lesion of the talus: persistent deep ankle pain after a sprain should not automatically be attributed to the ligament. Osteochondral lesions of the talus can coexist with or follow ankle trauma and may require MRI or orthopedic evaluation.
- Syndesmotic injury: pain above the ankle joint, with external rotation, push-off or cutting, suggests a high ankle sprain. These injuries are harder to diagnose, usually take longer to recover than lateral sprains and need weight-bearing radiographs, sometimes stress views or advanced imaging, because unstable injuries may need surgery (Alpert, 2026).
- Peroneal tendon pain or instability: pain behind the outside ankle bone, snapping or weakness of eversion.
- Sinus tarsi pain: lateral hindfoot pain that may follow an inversion injury or accompany instability.
- Fracture or bone stress: focal bone tenderness or pain that does not settle needs imaging.
- Nerve irritation: burning, tingling or numbness over the foot after a sprain points to a nerve rather than a ligament.
What We Examine
- Exactly where the pain sits and what reproduces it
- Swelling and joint-line tenderness
- Ligament laxity with anterior drawer and talar tilt testing, interpreted with the giving-way history
- Dorsiflexion range and whether it is limited by a pinch at the front or tightness at the back
- Peroneal, calf and tibialis anterior tendon loading
- Syndesmotic provocation and bone tenderness
- Single-leg balance, hop control and the movements your activities demand
Mechanical laxity testing should be interpreted alongside the patient’s giving-way history and functional control. A positive drawer test alone does not mean the ankle is symptomatically unstable.
How Treatment Is Selected
Progressive Ankle Rehabilitation
The foundation for most post-sprain problems. A clinical guideline prefers supervised exercise-based programs over passive modalities and reserves surgery for cases that do not respond to thorough exercise-based treatment (Vuurberg, 2018).
Balance and Sensorimotor Training
Important for giving-way presentations. An unstable ankle has to be retrained for the movements that expose the instability, progressing from single-leg balance to hopping, landing and change of direction when the patient’s activity requires it.
Calf and Peroneal Strength
Targeted when testing shows deficits in push-off, eversion or endurance.
Manual Treatment
For mobility restriction where appropriate, such as limited dorsiflexion or restricted calf and surrounding soft tissue. Manual treatment may help restore motion when mechanical restriction is present, but it does not reconstruct an insufficient ligament. Manual Adhesion Release may address restricted muscle and fascia found on examination.
Bracing and Support
Selected high-risk or unstable cases. A brace can reduce risk during high-demand activity, but it does not replace rehabilitation of strength and sensorimotor control.
Shockwave Therapy
Only when the actual pain generator, such as a peri-ankle tendon or enthesis problem, has appropriate evidence. Chronic ankle instability itself is not an established shockwave indication, and shockwave does not tighten a loose ligament, remove osteophytes or correct impingement. See the shockwave evidence review and shockwave therapy in Denver.
Ultrasound
Useful for the peroneal tendons, superficial ligaments and dynamic tendon instability where indicated.
MRI
Useful for osteochondral lesions, deep joint pathology, significant ligament injury and persistent unexplained pain.
Referral
For significant mechanical instability, osteochondral lesion, fracture, persistent locking, major tendon rupture, high-grade syndesmotic injury, progressive neurologic deficit or refractory symptoms requiring orthopedic evaluation.
You do not need to decide which treatment you need before your visit. All four tools are compared on the services page.
What the rehabilitation evidence supports
Preventing recurrence
Bracing + training
strong evidence for bracing and moderate evidence for neuromuscular training across 46 systematic reviews
PMID 28053200
Exercise for CAI
48 RCTs
all seven exercise approaches improved dynamic postural control in 1,630 people with chronic ankle instability
PMID 42227253
The certainty of evidence for ranking one exercise type above another is very low. The consistent message is that active rehabilitation is the foundation.
What Research Says
- The ligaments involved: lateral ankle sprains most commonly involve the ATFL. In a surgical series of 179 patients with chronic lateral instability, all had ATFL injury and the CFL was involved in a minority (Vermorel, 2026).
- Chronic instability is common: it is estimated that up to 40% of people with a first-time lateral ankle sprain develop chronic ankle instability (Hertel, 2019).
- Mechanical and functional components: an International Ankle Consortium consensus describes chronic instability as the interaction of mechanical and sensorimotor impairments and recommends assessing both after a sprain (Delahunt, 2018).
- Giving way matters: research definitions of chronic ankle instability emphasize recurrent sprains, episodes of giving way and validated measures of instability rather than simply a history of one prior ankle sprain (Gribble, 2014).
- Impingement is a compression problem: a 2026 systematic review distinguishes osteophyte-dominant and soft-tissue-dominant anterior impingement and describes oblique radiographs, dynamic ultrasound and MRI for diagnosis (Yang, 2026).
- Missed intra-articular problems: in the surgical series, 54.7% had concomitant intra-articular lesions, including soft-tissue impingement in 43.6% and osteochondral lesions in 15.1% (Vermorel, 2026).
- Rehabilitation: an overview of 46 systematic reviews found strong evidence for bracing and moderate evidence for neuromuscular training in preventing recurrent sprains (Doherty, 2017), and a clinical guideline prefers supervised exercise over passive modalities (Vuurberg, 2018).
- Syndesmotic injuries differ: high ankle sprains are harder to diagnose, usually take longer to recover than lateral sprains, and need imaging to judge stability because unstable injuries may need surgery (Alpert, 2026).
- Manual therapy is adjunctive: a systematic review found only small effects of mobilization on dorsiflexion in people with recurrent sprains and emphasized identifying what is limiting motion (Terada, 2013).
- Exercise options: a 2026 network meta-analysis of 48 randomized trials found that all seven exercise approaches improved dynamic postural control in chronic ankle instability, with very low certainty for ranking them (Chen, 2026).
- Shockwave is diagnosis-specific: we did not find controlled human trials of shockwave for chronic ankle instability, ATFL or CFL insufficiency or anterior impingement, so tendon and plantar fascia evidence should not be generalized to ligament instability.
This is why Novo treats chronic ankle pain as a localization and stability problem before deciding whether any passive treatment belongs in the plan.
Impingement vs instability → · ATFL and CFL injury → · Shockwave evidence →
Sources: Hertel and Corbett, J Athl Train 2019 · Gribble et al., Br J Sports Med 2014 · Delahunt et al., Br J Sports Med 2018 · Doherty et al., Br J Sports Med 2017 · Vuurberg et al., Br J Sports Med 2018 · Chen et al., EFORT Open Rev 2026 · Vermorel et al., J Exp Orthop 2026 · Yang et al., J Foot Ankle Surg 2026 · Alpert et al., Curr Sports Med Rep 2026 · Terada et al., J Athl Train 2013
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