Tarsal Tunnel Syndrome (TTS) happens when the tibial nerve (sometimes called the posterior tibial nerve) becomes compressed or irritated as it travels through a tight space on the inside of the ankle called the tarsal tunnel. When a nerve is squeezed, it can misfire. That is why TTS often causes burning pain, tingling, or numbness in the heel, arch, or sole of the foot, and sometimes into the toes.
The tarsal tunnel sits just behind the bony bump on the inner ankle (the medial malleolus). A strong band of tissue called the flexor retinaculum forms the “roof” of the tunnel. Inside the tunnel are tendons, blood vessels, and the tibial nerve. Because it is a narrow space, anything that reduces room or increases pressure can irritate the nerve. Examples include swelling after an ankle injury, flat feet with overpronation, a ganglion cyst, varicose veins, tendon inflammation, or less commonly an extra muscle.
TTS can feel similar to plantar fasciitis, plantar heel pain, or nerve-related heel pain from the back, so a good assessment matters. Physiotherapy for tarsal tunnel syndrome aims to reduce irritation of the tibial nerve by settling local inflammation, improving foot and ankle mechanics, and addressing contributors such as overpronation, calf tightness, and strength deficits. Physiotherapy also helps you return to walking, work, and sport without repeatedly flaring nerve symptoms.
In many people, non-surgical management works well, especially when the cause is reversible (like swelling, training overload, or biomechanics). If there is a clear structure taking up space in the tunnel (like a cyst) or symptoms persist despite good rehab, surgery may be considered to release the flexor retinaculum and decompress the nerve.
Key Facts
- MRI can identify a relevant pathology in the tarsal tunnel in up to 88% of symptomatic cases in a cited study, supporting imaging when symptoms are persistent or diagnosis is uncertain. 🔗
- Surgical outcomes for tarsal tunnel decompression vary widely in the literature, with reported success rates ranging from 44% to 96%. 🔗
- Many people improve without surgery through a combination of rest, physical therapy, stretching, and footwear changes, highlighting the importance of a conservative approach. 🔗
Risk Factors
- Flat feet or overpronation that increases load through the inside of the ankle and arch.
- A history of ankle sprains or medial ankle trauma with lingering swelling or scar tissue.
- Occupations with prolonged standing or walking (including long shifts on hard floors).
- Footwear that is tight around the inner ankle or poorly supportive through the arch.
- Diabetes or other conditions that increase nerve sensitivity or swelling risk.
- Space-occupying lesions (for example ganglion cysts or varicose veins) or anatomical variants (for example accessory muscles).
Symptoms
- Burning, aching, or shooting pain on the inside of the ankle and/or the sole of the foot.
- Tingling or numbness (pins and needles) in the heel, arch, sole, or toes.
- Pain that worsens with walking, running, or prolonged standing, especially later in the day.
- Night symptoms, including strange sensations or burning that disrupt sleep.
- Tenderness when pressing along the tarsal tunnel just behind the medial malleolus.
- In more advanced cases, weakness or clumsiness in the toes, or a sense the foot is not responding normally.
Aggravating Factors
- Prolonged standing or high daily step counts, particularly on hard surfaces.
- Running, jumping, or rapid increases in training volume or intensity.
- Foot overpronation or flat-foot loading, especially in unsupportive footwear.
- Tight shoes or boots that compress the inside of the ankle.
- Swelling after an ankle injury, particularly if the symptoms flare when you return to activity.
Causes
Tarsal Tunnel Syndrome is caused by compression or irritation of the tibial nerve within the tarsal tunnel. The tunnel is a tight passageway, so even small changes in swelling, tissue thickness, or foot mechanics can increase pressure on the nerve.
Common causes include:
Post-injury swelling: After an ankle sprain or trauma, swelling and scar tissue can reduce space in the tunnel and sensitise the nerve.
Biomechanics and overpronation: Flat feet or a foot that rolls in can increase strain through the inside of the ankle and raise pressure in the tunnel, particularly during long periods of standing or running.
Space-occupying lesions: Ganglion cysts, varicose veins, lipomas, or tendon sheath inflammation can physically crowd the tunnel. MRI is often used to look for these.
Accessory muscles: Some people have extra muscles that take up room. The flexor digitorum accessorius longus (FDAL) is one described accessory muscle linked with TTS in case literature.
Systemic and inflammatory contributors: Conditions such as diabetes can make nerves more vulnerable, and inflammatory conditions can increase swelling or tissue thickening around the nerve.
Physiotherapy for TTS is centred on identifying which of these drivers is most relevant for you. That matters because the best plan differs if your symptoms are driven mainly by foot posture and load, versus a cyst, versus post-traumatic swelling, versus systemic nerve vulnerability.
How Is It Diagnosed?
Diagnosis of Tarsal Tunnel Syndrome starts with a detailed history and physical examination. Your physiotherapist will ask where you feel symptoms (heel, arch, sole, toes), what triggers them (standing, walking, running, tight shoes), and whether symptoms are worse at night. Because several other conditions can mimic TTS, your physio will also screen for plantar fasciopathy, plantar heel pain of non-neural origin, lumbar nerve irritation, peripheral neuropathy, and other foot and ankle causes.
On examination, a physiotherapist will assess foot posture and gait, check tenderness along the tarsal tunnel, and test ankle and foot mobility and strength. Common clinical tests include tapping over the nerve to look for a Tinel-type response (reproducing tingling into the foot) and checking whether certain positions reproduce symptoms. Your physio will also examine calf tightness and lower-limb control, because these factors can increase strain through the inside of the ankle.
If symptoms are persistent, severe, or suggest a space-occupying lesion, your physiotherapist may recommend imaging and GP or specialist review. Imaging is used to look for causes such as cysts, varicosities, tendon inflammation, or other structures that reduce tunnel space.
Investigations & Imaging
- Ultrasound
- Can help identify swelling, tendon sheath irritation, cysts, or varicose veins around the tarsal tunnel, and may be used to guide procedures such as aspiration.https://eor.bioscientifica.com/view/journals/eor/6/12/2058-5241.6.210031.xml
- MRI
- Useful to identify space-occupying lesions, tendon inflammation, and other structural causes. A referenced study identified relevant pathology in up to 88% of symptomatic cases.https://eor.bioscientifica.com/view/journals/eor/6/12/2058-5241.6.210031.xml
- Nerve conduction studies (electrodiagnostic testing)
- May help when the diagnosis is unclear or to differentiate TTS from other nerve conditions, noting that TTS is often treated as a diagnosis of exclusion.https://now.aapmr.org/tarsal-tunnel-syndrome-and-intrinsic-neurologic-foot-disorders-2/
Physiotherapy Management
Physiotherapy for tarsal tunnel syndrome is designed to reduce pressure and irritation on the tibial nerve while rebuilding the foot and ankle’s ability to tolerate load. Because nerves can stay sensitive if they are repeatedly compressed, the plan usually combines load adjustment, biomechanical support, and progressive strengthening rather than pushing through symptoms.
Your physiotherapist will first identify the most likely drivers, such as overpronation, calf tightness, tendon irritation in the tunnel, post-injury swelling, or footwear factors. Treatment then targets these drivers while also calming the nerve. In practice, this means guiding your walking and exercise loads, improving foot control and arch support, and gradually reintroducing activities that previously triggered tingling or burning.
Importantly, physiotherapy also focuses on differential diagnosis. If your symptoms suggest a space-occupying lesion (like a ganglion cyst) or you are not improving as expected, your physio may recommend imaging and medical review so the underlying cause is not missed.
Exercise
Tarsal tunnel syndrome physiotherapy exercises usually focus on
- Improving foot and ankle strength to reduce strain through the inner ankle,
- Improving calf flexibility so the ankle moves efficiently, and
- Restoring arch control to reduce repeated compression at the tunnel.
Strengthening is often directed to the tibialis posterior and other arch-supporting muscles, because better dynamic arch support can reduce collapse and overpronation that increases pressure through the tunnel. A physiotherapist will also work on calf and soleus capacity so the foot can push off without excessive pronation.
Where appropriate, a physio may prescribe nerve mobilisation (nerve glides) for the tibial nerve. These are gentle movements designed to improve how the nerve slides and tolerates motion. They must be dosed carefully, because aggressive stretching can flare nerve symptoms. Your program is progressed using symptom behaviour, including your 24-hour response after walking or exercise.
Balance and proprioception training is often included, particularly if your symptoms started after an ankle sprain, because improved single-leg control reduces repeated strain through the medial ankle region during daily walking and sport.
Activity Modification
Activity modification for TTS is about reducing the activities that repeatedly compress the tibial nerve, while keeping you active. Many people flare with prolonged standing, long walks, running, and hard surfaces. Your physiotherapist may temporarily reduce these loads and substitute with options that are less irritating, such as cycling or swimming, while the nerve settles.
Footwear and surface choices also matter. Supportive shoes with adequate space around the inner ankle and arch can reduce irritation. If symptoms are clearly linked to overpronation and long standing, a short period of additional support (for example orthoses, taping, or a boot in more severe cases) may help calm the nerve while you build strength.
As symptoms improve, your physio will guide a graded increase in steps and impact, aiming to avoid the common pattern where symptoms feel fine during activity but spike later that night or the next day.
Manual Therapy
Manual therapy may be used when mobility restrictions and soft tissue tightness are contributing to increased medial ankle load. This can include gentle joint mobilisation to restore ankle dorsiflexion, and soft tissue techniques to address calf or deep posterior compartment tightness that can change how the foot loads.
Manual therapy in TTS is not a stand-alone fix. It is most useful when it improves your ability to walk and exercise with better mechanics, reducing repeated irritation at the tarsal tunnel. Your physiotherapist will link hands-on treatment to changes in gait, foot posture control, and exercise tolerance.
Postural Retraining
Postural retraining in tarsal tunnel syndrome usually means gait and foot control retraining. If your foot collapses inward during walking (over pronation), the inside of the ankle can be repeatedly loaded and compressed. Your physiotherapist may coach foot placement, step width, and single-leg alignment to reduce medial ankle strain.
For runners, this may include training modifications such as reducing sudden volume increases, adjusting cadence, and returning to hills and uneven surfaces later in the rehab process. The aim is not to force a perfect “textbook gait”, but to reduce the specific loading pattern that is irritating the tibial nerve in your case.
Bracing & Taping
Bracing and taping can provide short-term symptom relief in tarsal tunnel syndrome, particularly when overpronation or medial ankle strain is a key driver. Arch taping can reduce foot collapse and offload the tunnel during walking and standing. Your physiotherapist may use taping as a trial to predict whether orthoses are likely to help.
Orthotics can be helpful when foot posture is contributing, but they must be fitted and progressed carefully. Overly aggressive arch supports can sometimes irritate symptoms if they change pressure patterns too abruptly. A physiotherapist will help you introduce orthoses gradually and pair them with strengthening, so you build long-term capacity rather than relying on support alone.
In more severe cases or acute flare-ups, a short period in a walking boot or night splint may be considered as part of a broader plan, particularly when symptoms are highly reactive to weight-bearing.
Heat & Ice
Ice can help some people manage symptom flare after prolonged standing or walking, particularly if there is local swelling around the inner ankle. Heat is less commonly used for nerve irritation itself but may be useful for calf tightness if stiffness is contributing to increased medial ankle load. Your physiotherapist will guide what is appropriate based on your presentation.
Tens
TENS may be used as a short-term pain modulation option if burning pain is limiting sleep or daily activity. In tarsal tunnel syndrome, it is usually an adjunct that helps you stay mobile and complete your rehab plan rather than the main treatment.
Education
Education is central to tarsal tunnel syndrome rehab. Your physiotherapist will explain how nerve symptoms behave differently from muscle or tendon pain, including why tingling may flare later in the day or at night after a busy day on your feet. You will learn how to pace standing and walking, how to choose shoes that reduce medial ankle compression, and how to progress exercise without constantly re-irritating the nerve.
Education also covers red flags and escalation points, such as progressive weakness, worsening numbness, or symptoms that fail to improve with good conservative care, which may indicate the need for imaging and medical review for a space-occupying lesion.
Other
Other management may include coordination with your GP for medication advice when nerve pain is limiting function, and referral for imaging if a structural cause is suspected. In selected cases, ultrasound-guided procedures (such as aspiration of a ganglion cyst) may be discussed by your medical team. Physiotherapy remains important either way, because restoring foot mechanics, strength, and load tolerance is key for reducing recurrence.
Other Treatments
Other treatments can include short-term medication guidance from your GP (for example anti-inflammatory medication for pain and swelling, or medications aimed at neuropathic pain when burning and night pain are prominent). In some cases, a corticosteroid injection may be considered by a doctor to reduce local inflammation, particularly when symptoms are highly reactive. If a ganglion cyst is present, ultrasound-guided aspiration may be used in selected cases.
These options are usually most effective when combined with a physiotherapy for TTS plan that addresses the underlying contributors, such as overpronation, calf tightness, footwear, and load management. Without addressing these, symptoms may settle temporarily but return when the same stresses build up again.
Prognosis & Return to Activity
The prognosis for tarsal tunnel syndrome depends on the cause, how long symptoms have been present, and how consistently contributing factors are addressed. Many people with mild to moderate symptoms improve with conservative management when the key drivers are identified, especially if the main issues are swelling, training overload, footwear, or biomechanical stress.
If there is a space-occupying lesion, recovery may depend on treating that lesion. Persistent nerve compression can lead to longer-lasting symptoms, and in advanced cases weakness or ongoing numbness can be slower to recover.
Return to activity is typically guided by symptom behaviour. In physiotherapy, a common approach is to progress walking and exercise in a graded way so that tingling and burning do not progressively worsen across the day or disrupt sleep. For runners and field athletes, return to impact is usually staged, starting with reduced volume and flat surfaces, then building tolerance to hills, uneven ground, and speed once symptoms are stable.
Complications
- Persistent burning pain or night symptoms that reduce sleep quality if nerve irritation remains uncontrolled.
- Ongoing numbness or altered sensation in the sole of the foot, especially if compression has been present for a long time.
- Reduced walking tolerance and reduced participation in sport due to recurrent flare-ups with standing and impact.
- In more advanced cases, weakness of toe muscles and reduced foot control, affecting balance and gait.
Preventing Recurrence
- Manage overpronation drivers long-term. Continue foot and tibialis posterior strengthening so the arch is supported during long days on your feet and reduces repeated tunnel compression.
- Progress training loads gradually. Avoid sudden spikes in walking, running, or hill work that increase swelling and medial ankle strain around the tarsal tunnel.
- Choose footwear that does not compress the inner ankle and provides stable arch support. Replace worn-out shoes that allow the foot to collapse and overload the tunnel.
- Maintain calf flexibility and ankle mobility. Reduced dorsiflexion can shift loads through the inside of the ankle and increase irritation of the tibial nerve.
When to See a Physio
- If you have burning pain, tingling, or numbness in the sole of the foot that worsens with walking or standing.
- If symptoms wake you at night or are progressively spreading into more of the foot or toes.
- If you have ongoing medial ankle tenderness and symptoms have not improved with basic rest and footwear changes.
- If you have weakness in the toes or worsening numbness, as this may require imaging and medical review.