Tarsal Tunnel Syndrome

Lower Limb

Overview

Tarsal tunnel syndrome is a compression neuropathy of the posterior tibial nerve as it passes through the tarsal tunnel behind the medial malleolus. It presents with pain, paresthesia, and numbness in the medial ankle, sole of the foot, and heel, often worsening with activity and relieved by rest. The condition can significantly impact gait and functional mobility if untreated.

Pathophysiology

The posterior tibial nerve becomes compressed within the tarsal tunnel, a fibro-osseous canal formed by the flexor retinaculum, medial malleolus, and talus. Compression may result from space-occupying lesions (ganglions, tenosynovitis, accessory muscles), ankle edema, trauma, excessive pronation, or inflammation of surrounding structures. Chronic compression impairs nerve conduction velocity, leading to demyelination, ischemia, and progressive neurological symptoms including sensory loss and motor dysfunction of intrinsic foot muscles.

Typical Presentation

Site

Medial ankle (behind medial malleolus), heel, sole of foot, medial arch, and plantar surface; symptoms may radiate proximally along medial leg or distally into toes

Quality

Burning, tingling, numbness, or electric shock-like sensations; may include cramping or aching in the foot and heel

Intensity

Mild to severe, typically 4-8/10, often progressive; may be constant or intermittent

Aggravating

Prolonged standing or walking, activities involving ankle inversion/eversion, tight footwear, ankle edema, jumping or running, activities that increase tarsal tunnel pressure

Relieving

Rest and elevation, ankle support or orthotic devices, ice application, removing tight footwear, non-weight-bearing positions

Associated

Ankle swelling, decreased ankle mobility, foot cramps, muscle weakness in foot intrinsics, toe clawing, altered gait, cold feet, difficulty with fine foot movements

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

Tinel's Sign (Tarsal Tunnel)

Procedure

Tap gently along the tibial nerve behind and below the medial malleolus.

Positive Finding

Tingling or pins and needles spreading into the sole, heel or toes.

Interpretation

Supports tibial nerve irritation in the tarsal tunnel. Combine it with the dorsiflexion–eversion test, the sensory pattern (sole of the foot, sparing the top) and the history. A lumbar (S1) nerve root problem or peripheral neuropathy can cause similar symptoms. A literature search (Europe PMC, September 2026) found no study reporting the diagnostic accuracy of this test, so no figure is shown.

Sources

No accuracy study

Dorsiflexion–Eversion Test

Procedure

Patient seated or supine. Passively dorsiflex the ankle, evert the foot and extend all the toes, then hold for 5–10 seconds.

Positive Finding

Reproduction of burning, tingling or numbness in the sole or toes, or pain at the tarsal tunnel.

Sensitivity / Specificity

82% (36 of 44 feet)/—

Interpretation

Stretches the tibial nerve through the tarsal tunnel and supports tarsal tunnel syndrome when it reproduces the symptoms (the Kinoshita test). In 37 people (44 feet) who later had surgery for tarsal tunnel syndrome, the test reproduced or worsened the symptoms in 36 feet (Kinoshita 2001). It caused no symptoms in 50 healthy volunteers, but healthy people are not a fair comparison, so no specificity is shown. People who need surgery usually have clear-cut disease, so the test may pick up fewer milder cases.

Sources

No accuracy study

Tarsal Tunnel Compression Test (Manual Compression)

Procedure

Press firmly with your thumb over the tarsal tunnel, behind and below the medial malleolus, and hold for up to 30 seconds. The ankle can be held in plantarflexion and inversion.

Positive Finding

Reproduction of the familiar tingling or numbness into the sole or toes.

Interpretation

Supports tibial nerve compression in the tunnel. Not well studied; use it with the other tests.

Sources

No accuracy study

Heel and Toe Walking (Neurological Screen)

Procedure

Ask the patient to walk on the heels, then on the toes.

Positive Finding

Unable to walk on the heels (weak ankle dorsiflexors) or on the toes (weak plantarflexors).

Interpretation

Heel walking tests the ankle dorsiflexors (L4–L5, deep peroneal nerve), not the tibial nerve in the tarsal tunnel. Weakness points to a lumbar nerve root or peroneal nerve problem and helps rule out other causes of foot symptoms.

Sources

No accuracy study

Nerve Conduction Studies (NCS) and EMG

Procedure

Arranged by a doctor and performed by a neurophysiologist.

Positive Finding

Slowed conduction in the medial or lateral plantar nerves, or signs of denervation in the foot muscles.

Interpretation

Supports the diagnosis and helps rule out a lumbar nerve root problem or peripheral neuropathy. A normal study does not fully exclude tarsal tunnel syndrome.

Sources

No accuracy study

MRI or Ultrasound of the Ankle

Procedure

Arranged by the treating doctor when a space-occupying cause is suspected or surgery is being considered.

Positive Finding

A structure pressing on the nerve, such as a ganglion, varicose veins, a tenosynovitis or an accessory muscle.

Interpretation

Looks for a treatable cause of compression. Imaging is often normal in tarsal tunnel syndrome.

Sources

⚠ Red Flags

  • •Acute severe pain with evidence of compartment syndrome (pain out of proportion, pain with passive stretch)
  • •Progressive neurological deficit with motor weakness and sensory loss
  • •Signs of complex regional pain syndrome
  • •Unexplained systemic symptoms suggesting underlying metabolic or rheumatological disease
  • •History of trauma with acute onset and signs of fracture
  • •Suspected space-occupying lesion (palpable mass, progressive unilateral symptoms)

⚡ Yellow Flags

  • •High anxiety or catastrophizing about symptoms
  • •Excessive health beliefs linking minor symptoms to serious disease
  • •Significant functional limitation disproportionate to clinical findings
  • •History of chronic pain conditions or fibromyalgia
  • •Pending litigation or compensation claims related to foot pain
  • •Reluctance to engage in rehabilitation or activity modification
  • •High perceived disability with low pain levels

Osteopathic Techniques

Conservative care usually works and is tried before surgery: activity modification, pain relief, orthoses and supportive footwear, steroid injection, calf stretching and nerve gliding. Decompression is considered when a clear, surgically treatable cause is found. S1 radiculopathy is a key differential.

Region

Tibial nerve (back of the knee to the sole)

Technique

Neural mobilisation, lower limb
Grade D
Low evidence: expert consensus or could not be verified against literature
No trials found. A reference chapter lists nerve gliding as possibly helpful.

Rationale

Gentle sliding of the nerve along its path through the lower back, buttock, leg and foot.

How it's done & evidence

How it's done

A movement-based treatment aimed at the nerve and the tissues around it. Gentle, rhythmic movements of the spine, hip, knee and ankle slide or lightly tension the sciatic nerve and its branches (for example in slump or straight-leg-raise positions).

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of neural mobilisation in tarsal tunnel syndrome. StatPearls lists nerve mobilisation or gliding, with activity modification and calf stretching, as possibly easing symptoms.

Region

Calf (gastrocnemius and soleus)

Technique

Muscle energy, calf (gastrocnemius and soleus)
Grade D
Low evidence: expert consensus or could not be verified against literature
No trials found. A reference chapter lists calf stretching as possibly helpful.

Rationale

Muscle energy technique to lengthen the gastrocnemius and soleus.

How it's done, cautions & evidence

How it's done

The calf is taken to its barrier by dorsiflexing the ankle. The patient pushes the foot gently down, at about 10–20% effort, against resistance for 5–10 seconds, relaxes for 3–5 seconds, and the new barrier is taken up.

Cautions

Not used with an acute fracture, a joint infection or a bone malignancy; take care with severe osteoporosis or after surgery that limits muscle contraction. Use the least force needed: too much can tear a muscle or pull off a tendon, especially in older patients.

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of calf MET in tarsal tunnel syndrome. StatPearls lists calf stretching among conservative measures that may ease symptoms.

Region

Calf and medial ankle tendons (no direct pressure over the tunnel)

Technique

Soft tissue, calf and lower legNo trials found

Rationale

Soft tissue to the calf and the tendons behind the inner ankle (tibialis posterior, long toe flexors).

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the calf (gastrocnemius and soleus), the Achilles tendon and the peroneal and tibial muscles of the lower leg. In trials it was given alongside exercise, such as eccentric calf loading.

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of soft tissue technique in tarsal tunnel syndrome.

Region

Plantar fascia and intrinsic foot muscles

Technique

Soft tissue, foot and ankleNo trials found

Rationale

Soft tissue to the plantar fascia and foot intrinsic muscles.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the plantar fascia, the small muscles of the foot and the tissues around the heel and the ankle ligaments.

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of soft tissue technique to the foot in tarsal tunnel syndrome.

Sources

Region

Talocrural and subtalar joints

Technique

Articulation, ankle and footNo trials found

Rationale

Gentle glides of the ankle, subtalar and midfoot joints to restore movement.

How it's done, cautions & evidence

How it's done

Passive, rhythmic, low-velocity glides of the ankle (talocrural), subtalar, midfoot and toe joints, within or up to the end of the available range, often aimed at restoring ankle dorsiflexion.

Cautions

Before mobilising an acute ankle injury, check for fracture with the Ottawa ankle rules (tenderness over either malleolus), and palpate the base of the 5th metatarsal, the navicular and the midfoot for a Lisfranc injury.

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of ankle or foot mobilisation in tarsal tunnel syndrome.

Region

Lumbar spine (L4–S1: S1 radiculopathy is a key differential)

Technique

Articulation, lumbarNo trials found

Rationale

Gentle mobilisation of the lumbar segments that give rise to the nerve.

How it's done, cautions & evidence

How it's done

Rhythmic, low-velocity movement of restricted lumbar segments within their passive range, with no thrust, usually side-lying or prone. The amplitude can vary.

Cautions

Side effects reported in trials were mild and short-lived: soreness, tiredness or a flare of existing symptoms.

Evidence in Tarsal Tunnel Syndrome

Searched 26 Oct 2026: no trials of lumbar mobilisation in tarsal tunnel syndrome.

Sources

Rehabilitation Exercises

Ankle Alphabet

Range of MotionBeginner

Plantar Fascia Stretch with Towel Roll

StretchingBeginner

Calf Stretch (Soleus Emphasis)

StretchingBeginner

Short Foot Exercise (Intrinsic Foot Muscles)

StrengtheningBeginner

Tibialis Posterior Isometric Hold

StrengtheningBeginner

Toe Curls with Resistance Band

StrengtheningIntermediate

Single-Leg Stance on Firm Surface

BalanceIntermediate

Foot Inversion and Eversion Control Exercise

PosturalIntermediate

Seated Marbles Pickup with Toes

StrengtheningBeginner

Toe Flexion and Extension Sequence

Range of MotionBeginner

Tandem Walking (Heel-Toe)

BalanceIntermediate

Supported Pool Walking or Swimming

CardiovascularBeginner

Referral Criteria

  • •Severe progressive neurological deficit with motor weakness or significant sensory loss not responding to conservative management after 6-8 weeks
  • •Imaging evidence of significant space-occupying lesion (ganglion, tumor, tenosynovitis) causing compression
  • •Failure to improve with appropriate conservative osteopathic and physiotherapy management after 8-12 weeks
  • •Suspected complex regional pain syndrome or neuropathic pain syndrome requiring specialist pain management
  • •Electrophysiological confirmation of significant nerve conduction abnormality warranting consideration of surgical decompression
  • •Systemic symptoms or metabolic factors (diabetes, thyroid dysfunction, rheumatological disease) requiring medical management
  • •Acute severe presentation with evidence of trauma or fracture requiring imaging and orthopedic assessment
  • •Ankle instability or significant structural damage identified during assessment requiring imaging or specialist review