Posterior Ankle Impingement: A Common Cause of Pain at the Back of the Ankle

Pain at the back of the ankle can be frustrating, especially when it limits walking, running, jumping or pointing the toes. One frequently missed cause is posterior ankle impingement - a condition commonly seen in athletes, dancers and active individuals, but also in everyday patients.

This blog explains what posterior ankle impingement is, how it develops, common signs and symptoms, physiotherapy treatment, and other conditions that may cause similar pain.

What Is Posterior Ankle Impingement?

Posterior ankle impingement occurs when structures at the back of the ankle become compressed or “pinched” during movements that involve plantarflexion - pointing the foot downward.

This compression usually happens between the talus bone and the tibia, trapping soft tissues, bone, or both. Over time, this repeated pinching causes pain, inflammation and reduced ankle function.

From a clinical perspective, posterior ankle impingement may involve:

• An os trigonum (an extra bone at the back of the ankle)

• A prominent posterior talar process

• Thickened joint capsule or ligaments

• Irritation of the flexor hallucis longus (FHL) tendon

How Do People Get Posterior Ankle Impingement?

Posterior ankle impingement usually develops from repetitive loading or forced end-range ankle movement, rather than a single traumatic injury.

Common causes include:

• Repeated toe-pointing movements (ballet, gymnastics, kicking sports)

• Sports involving sprinting, jumping or sudden direction changes

• Previous ankle sprains leading to altered joint mechanics

• Poor ankle mobility or calf tightness

• Anatomical variations such as an os trigonum

It is particularly common in:

• Ballet dancers

• Soccer players

• AFL and rugby players

• Runners

• Cross-training and gym participants

Common Signs and Symptoms

Posterior ankle impingement often presents subtly at first and worsens over time.

Typical symptoms include:

• Pain at the back of the ankle, especially when pointing the toes

• Pain during push-off while walking or running

• Discomfort when going downhill or downstairs

• Swelling or tenderness at the back of the ankle

• Reduced ankle range of motion

• Pain that increases with sport or activity and settles with rest

Clinically, pain is often reproduced with forced plantarflexion during assessment.

Physiotherapy Treatment for Posterior Ankle Impingement

Physiotherapy is the first-line treatment for posterior ankle impingement and is highly effective in most cases when addressed early.

A physiotherapy program typically includes:

Load Management & Activity Modification

Reducing aggravating movements while maintaining fitness is critical in the early stages.

Manual Therapy

• Ankle joint mobilisation

• Soft tissue treatment to the calf and posterior ankle structures

• FHL tendon release when indicated

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Strengthening & Mobility

• Calf strengthening (gastrocnemius and soleus)

• Foot intrinsic muscle control

• Ankle stability and proprioception training

• Improving dorsiflexion range to reduce posterior compression

Biomechanical Correction

• Gait and running assessment

• Technique correction for dancers or athletes

• Footwear advice and orthotic assessment where appropriate

Return-to-Sport Planning

A graded return to sport ensures the ankle tolerates load safely and reduces recurrence.

In persistent cases, imaging such as MRI or ultrasound may be used to confirm the diagnosis and guide further management.

Other Conditions That Can Mimic Posterior Ankle Impingement

Several conditions cause pain at the back of the ankle and must be ruled out:

• Achilles tendinopathy

• Retrocalcaneal bursitis

• Flexor hallucis longus (FHL) tendinopathy

• Posterior talar stress fracture

• Ankle arthritis

• Sinus tarsi syndrome

• Referred pain from the calf or lumbar spine

  
  

Accurate diagnosis is essential, as management strategies differ significantly between these conditions.

When Should You See a Physiotherapist?

If you experience ongoing pain at the back of the ankle, particularly pain that worsens with pointing the foot or during sport, early assessment by a physiotherapist can prevent long-term issues and unnecessary time away from activity.

A thorough clinical examination, combined with targeted rehabilitation, often resolves symptoms without the need for injections or surgery.

If you're dealing with any of these symptoms. Book with Urban Physiotherapy today! - https://urban-physiotherapy.au2.cliniko.com/bookings?business_id=423637795941128200#service