Tarsal Tunnel Syndrome
Tarsal tunnel syndrome is compression of the tibial nerve, or one of its branches, as it passes through a narrow tunnel behind the bony bump on the inside of the ankle. At Modern Physio we focus on understanding the root-cause of your problem & personalizing your treatment for lasting results.
Understanding Tarsal Tunnel Syndrome
Tarsal tunnel syndrome is compression of the tibial nerve, or one of its branches, as it passes through a narrow tunnel behind the bony bump on the inside of the ankle. It causes burning, tingling, electric or numb sensations in the sole of the foot and sometimes the toes, often worse with prolonged standing and walking and frequently worse at night. The single most useful thing to understand about it is how often it is mistaken for plantar fasciitis. Both cause pain underneath the heel, both are common in people who are on their feet, and plantar fasciitis is far more familiar, so it tends to be the label that gets applied. The clinical literature notes explicitly that tarsal tunnel syndrome is commonly misdiagnosed as plantar fasciitis. The distinction is usually available from the history: plantar fasciitis produces sharp mechanical pain that is at its worst with the first steps in the morning and eases as you warm up, while nerve compression produces burning, tingling or electric symptoms that spread into the sole and toes and often worsen through the day or at night. Diagnosis here is largely clinical, because nerve conduction studies in this condition carry a high rate of false negatives and are best used as an adjunct rather than the deciding test. At Modern Physio in Vaishali Nagar, Jaipur, we assess the foot posture that drives the compression, since correcting a collapsed arch or hindfoot position reduces tension on the nerve directly, and this is one of the conditions where orthotic management has a clear mechanical rationale.
Common Symptoms
- Burning, tingling or electric sensations in the sole of the foot
- Numbness in the sole or toes, sometimes patchy rather than uniform
- Symptoms that spread from the inside of the ankle into the arch and toes
- Pain that is worse with prolonged standing or walking rather than at the first step in the morning
- Night symptoms that disturb sleep or make you want to hang the foot out of bed
- Tenderness or a tingling shock when the area behind the inner ankle bone is tapped
- Symptoms that worsen through the day, in contrast to the morning pattern of plantar fasciitis
- A sense that the foot is not giving reliable information about the ground
- In longer-standing cases, weakness of the small muscles of the foot or clawing of the toes
- Symptoms that came on alongside a flattening arch, an ankle injury, or a period of increased standing
How Common Is It?
Tarsal tunnel syndrome is considered uncommon relative to the nerve entrapments of the upper limb, but it is also widely regarded as under-recognised, largely because it is so readily labelled plantar fasciitis. It affects adults across a wide age range and is more likely in people who spend long periods standing or walking, and in those whose arch has flattened. No India-specific prevalence data was identified. Diagnosis rests mainly on the clinical picture, since electrophysiological testing in this condition produces an unacceptable rate of false negatives and is best treated as supporting information rather than a definitive test.
Causes & Risk Factors
- A flattened arch or an inward-rolled hindfoot position, which increases tension on the nerve as it passes behind the inner ankle
- Posterior tibial tendon dysfunction, which allows the arch to collapse progressively
- Swelling or tenosynovitis of the tendons that share the tunnel with the nerve
- A space-occupying lesion within the tunnel, such as a ganglion or an enlarged vein
- Previous ankle fracture, sprain or surgery that changed the shape of the tunnel or left scar tissue
- Systemic conditions that make nerves more vulnerable to compression, including diabetes
- Prolonged standing or walking occupations, and a sudden increase in either
- Footwear that provides no arch support, including going barefoot on hard floors for long periods
- Swelling of the lower limb from any cause, which reduces the space available in the tunnel
Our Diagnosis Process
- A history that separates neuropathic symptoms, meaning burning, tingling and electric sensations, from the mechanical first-step pain typical of plantar fasciitis
- Tapping over the nerve behind the inner ankle bone to see whether that reproduces tingling into the sole
- Assessment of foot posture in standing and walking, particularly arch height and hindfoot position
- Assessment of posterior tibial tendon function, since its failure is a common driver of the arch collapse behind this condition
- Sensory testing across the sole to map the affected area
- Assessment of ankle and first toe range, calf length and walking pattern
- Screening for a lumbar nerve root problem and for peripheral neuropathy, including diabetic neuropathy, both of which can produce similar foot symptoms
- Referral for imaging where a space-occupying lesion is suspected, and for nerve conduction studies as an adjunct where the diagnosis remains unclear or symptoms are not settling
Our Treatment Approach
- Correcting the foot position that is generating tension on the nerve, which is the most mechanically direct intervention available
- Orthotic management, including custom or prefabricated devices to support the arch and control hindfoot position
- Footwear advice, including supportive shoes and avoiding prolonged barefoot walking on hard floors
- Activity and load modification to reduce prolonged standing and walking while symptoms settle
- Strengthening of the posterior tibial muscle and the small muscles of the foot to support the arch actively rather than relying on the orthosis alone
- Calf flexibility work where tightness is contributing to the foot position
- Gentle nerve mobility work, introduced at low intensity because irritable nerve tissue reacts badly to aggressive stretching
- Swelling management where oedema is reducing the space in the tunnel
- Manual therapy for the ankle and foot as an adjunct alongside the mechanical correction
- A defined review point of around six to eight weeks, with referral onward if conservative care has not produced meaningful change
Key Highlights
Careful separation from plantar fasciitis, which this condition is commonly mistaken for
Orthotic and foot posture correction, where the mechanical rationale is clearest
Recognition that nerve conduction studies can be falsely normal in this condition
A clear referral point if conservative treatment has not worked
Recovery & Prevention Tips
- Notice the pattern of your symptoms: burning and tingling that spreads into the sole behaves differently from the sharp first-step heel pain of plantar fasciitis, and the difference guides treatment
- Wear supportive footwear consistently, including indoors, rather than only for exercise
- Avoid long periods barefoot on hard floors while symptoms are settling
- Use the orthosis as prescribed, because correcting the foot position reduces tension on the nerve directly
- Do the foot and posterior tibial strengthening, since the aim is for your own muscles to support the arch over time
- Go gently with nerve mobility exercises, which should not leave symptoms flared the next day
- Break up long periods of standing where you can, and change position regularly
- Elevate the foot at the end of the day if swelling is part of your picture
- Report worsening numbness, weakness or clawing of the toes rather than waiting for a routine appointment
- If treatment for plantar fasciitis has not helped after a fair trial, it is reasonable to ask whether the diagnosis should be revisited
Products That Can Help
Supports and equipment we fit at the clinic that patients with this condition commonly use alongside treatment, never instead of it.
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Evidence & Sources
Clinical reference literature describes tarsal tunnel syndrome as a compressive neuropathy of the tibial nerve or its branches beneath the flexor retinaculum, and notes that it can present similarly to plantar fasciitis since both cause plantar heel pain, with tarsal tunnel syndrome thought to be commonly misdiagnosed as plantar fasciitis.
Tarsal Tunnel Syndrome (Physiopedia)The same source notes that there is limited quality evidence for electrophysiological techniques in tarsal tunnel syndrome, that they yield unacceptable false-negative rates, and that they should be treated as adjunctive rather than definitive.
Tarsal Tunnel Syndrome (Physiopedia)Frequently Asked Questions
How is this different from plantar fasciitis?
The quality and timing of the symptoms usually separate them. Plantar fasciitis produces sharp, mechanical pain focused at the front of the heel, classically worst with the first few steps in the morning or after sitting, easing as you warm up and returning after activity. Tarsal tunnel syndrome produces burning, tingling, electric or numb sensations that spread through the sole and sometimes into the toes, frequently worse with prolonged standing and walking and often worse at night. Tapping behind the inner ankle bone may reproduce the tingling. They can coexist, which adds to the confusion, and this condition is commonly misdiagnosed as plantar fasciitis.
My nerve test was normal. Does that rule it out?
No, and this is an important point. Nerve conduction studies in tarsal tunnel syndrome are known to produce a high rate of false negatives, and clinical reference literature explicitly describes them as adjunctive rather than definitive for this condition. A normal study is useful information, particularly for excluding a wider peripheral neuropathy, but it does not exclude tarsal tunnel syndrome on its own. Diagnosis here rests mainly on the clinical picture: the character of the symptoms, their distribution, the response to tapping over the nerve, and the foot posture.
Will orthotics actually help, or are they just a comfort measure?
In this condition the rationale is more direct than in many others. If the arch is collapsing and the hindfoot is rolling inwards, the nerve is placed under increased tension as it passes behind the inner ankle. Correcting that position mechanically reduces the tension. That makes orthotic management one of the more logically grounded interventions available here, rather than simply cushioning. It works best alongside strengthening, because the aim over time is for your own posterior tibial muscle and foot muscles to hold the arch rather than depending entirely on the device.
How long should I try physiotherapy before considering surgery?
A reasonable trial is around six to eight weeks of properly delivered conservative treatment, which means orthotic correction, footwear change, load modification and strengthening actually being followed rather than partially attempted. If there has been no meaningful change in that period, that is useful information and a reason to reassess rather than continue indefinitely. At that point imaging to look for a space-occupying lesion, and a surgical opinion about tarsal tunnel release, both become reasonable. Surgery is generally reserved for cases with a structural cause or genuine failure of conservative care.
Why is it worse at night?
Night symptoms are characteristic of nerve compression generally rather than of mechanical tissue pain. During the day, movement and muscle activity keep blood flowing and the position of the ankle keeps changing. At night the foot stays in one position for hours, circulation to the nerve is at its lowest, and there is no distraction from the sensation. Many people find themselves moving the foot, hanging it out of bed or getting up to walk about. It is one of the features that helps distinguish this from plantar fasciitis, where the pain is at its worst on first standing rather than during the night.
Could my diabetes be causing this instead?
It might be contributing, and it is one of the things we screen for. Diabetes makes nerves more vulnerable to compression, so it can be a background factor in a genuine tarsal tunnel syndrome. It also causes peripheral neuropathy in its own right, which produces burning and numbness in both feet in a stocking distribution rather than the more localised pattern of a single compressed nerve. The two can coexist. If the pattern suggests diabetic neuropathy rather than a local entrapment, that changes the management considerably and is a matter for your treating doctor as much as for physiotherapy.
Should I stop walking and standing?
Reduce rather than stop, in most cases. Prolonged standing and walking clearly aggravate this condition, so cutting the duration and breaking up long periods helps symptoms settle. But complete rest does not correct the foot position that is causing the compression, and it costs you fitness and foot muscle strength that you need. The more useful changes are usually footwear, orthotic support and breaking up long periods on your feet, alongside a strengthening programme, rather than avoidance.
Can this cause permanent damage if left alone?
Prolonged, significant nerve compression can lead to lasting sensory change and weakness of the small muscles of the foot, which shows up as clawing of the toes in longer-standing cases. That is uncommon and is a reason to have persistent symptoms assessed rather than a reason for alarm. Most people who are diagnosed reasonably promptly and whose foot position is corrected do well with conservative treatment. Worsening numbness, new weakness or visible changes in toe position are the features that should prompt earlier review rather than waiting.
Medically Reviewed
This content was reviewed for medical accuracy by Dr. Surabhi Bansal, BPT, MPT (Ortho) with 14+ years of clinical experience.
At Modern Physio, all medical content undergoes a thorough review process to ensure accuracy and alignment with current physiotherapy standards. Our content is created to educate and should not replace professional medical advice. Learn more about our review process.
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Assessment & Education
Distinguishing nerve compression from plantar fasciitis, and assessing the foot posture driving it.
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Posterior tibial and intrinsic foot strengthening to support the arch actively.
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