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Atlas · Lower Leg

Tibialis Posterior

Tibialis posterior is a deep calf muscle whose tendon passes behind the inner ankle to support the foot during stance. Inner-ankle pain, a changing arch or difficulty with a heel rise needs a tendon and foot-function assessment; it should not be explained as a muscle knot releasing the arch.

Tibialis Posterior
Body region
Lower Leg
Trigger points
1
documented in this muscle
Common symptoms
3
patterns cataloged
Contributors
3
Factors to assess

Muscle overview

Symptoms and first steps

Practical first steps

  • Reduce the amount of standing or running that provokes a persistent flare while maintaining comfortable activity.
  • Use supportive footwear if it improves comfort; a clinician can assess whether an orthosis or brace is appropriate.
  • Avoid deep calf digging or prolonged pressure behind the inner ankle.

When to seek assessment

  • New severe escalating leg pain, a tense swollen compartment, pain with passive toe movement or a cold/pale foot requires emergency assessment.
  • New foot drop, repeated foot slapping, progressive weakness or persistent numbness needs prompt neurological assessment.
  • New unilateral swelling/warmth, a suspected fracture or inability to bear weight warrants medical assessment before massage or loading. Breathlessness or chest pain with leg swelling is an emergency.

Examine the tendon behind the medial malleolus and the foot during a heel rise. A deep calf tenderness finding does not rule out progressive tendon/foot dysfunction.

Examination, palpation and treatment evidence

Illustrated overview

Tibialis Posterior · Anatomy and referred pain 1

Representative source regions. The illustrated markers and pain pattern are not individual assignments to the numbered trigger points.

Open full-size image

Trigger points

1. Tibialis Posterior

Location. Deep posterior lower-leg muscle region; the tendon passes behind the medial malleolus into the foot

Trigger point map
Tibialis Posterior — Trigger point mapOpen full-size image

Shared muscle diagram; it may show several trigger points.

Referred pain map
Tibialis Posterior — Tibialis Posterior · Referred-pain pattern 1Open full-size image

Regional muscle reference; this is not an individual map of the selected numbered trigger point.

Pain referral. Back of leg, inner ankle, arch of foot

Pain Pattern

  • Posterior leg
  • Inner ankle
  • Arch of foot
  • Calf

What This Pain Feels Like

A deep calf symptom may coexist with inner-ankle or arch pain. Persistent tendon-region swelling, a changing arch or reduced heel-rise ability warrants assessment for tibialis posterior tendon dysfunction rather than assuming that muscle release will restore support.

What Patients Report

  • Pain at inner ankle
  • Arch pain
  • Calf discomfort
  • Pain when walking
  • Foot feels flat

What Makes It Worse

  • Walking
  • Running
  • Standing
  • Overpronation
  • Going upstairs
Browse related exercises (12)

Symptoms patients report

Inner-ankle or arch load pain Note pain behind the medial malleolus, near the navicular or during prolonged stance; these often direct attention to the tendon.

Reduced heel-rise or walking tolerance Difficulty lifting the heel or the foot failing to change position normally can indicate a broader muscle-tendon/foot problem.

Deep posterior-leg discomfort The belly lies deep to other calf structures; pain at depth does not identify it selectively.

Contributors to assess

Changed walking or running load Longer standing, a rapid mileage increase or a new return to activity can alter tendon and muscle demand.

Established foot deformity or tendon disease A progressively flatter or more abducted foot should be assessed, including whether the deformity remains flexible.

Neurological overactivity An involuntarily inverted foot after neurological injury is a separate spasticity presentation with different treatment goals.

For clinicians and supervised training

Clinical reference

Medial ankle, arch and calf pain have overlapping tendon, nerve, bone and muscle causes. Visible arch change is a clinical finding requiring assessment, not proof of a trigger point.

Anatomy and palpation

Anatomical relationships

Tibialis posterior arises from the posterior tibia, fibula and interosseous membrane in the deep posterior compartment. Its tendon travels behind the medial malleolus and fans into the navicular and other midfoot attachments. It contributes to inversion and plantar flexion and supports the foot under load.[1][2]

  • Medial malleolus identifies the tendon turn around the ankle.
  • The navicular tuberosity is an important distal tendon attachment.
  • The posteromedial tibial border helps orient the leg, but the belly remains deep.

Nearby structures. FDL and FHL share the deep compartment; soleus overlies it. The tibial nerve and posterior tibial vessels pass through the tarsal tunnel close to the tendons.

Palpation

Patient position. Seated or side lying with the lower leg supported, knee relaxed and ankle accessible.

Find the landmarks

  • Medial malleolus
  • Tendon course toward the navicular
  • Posteromedial leg with overlying soleus

Examination sequence

  1. Inspect foot posture and swelling before palpation.
  2. Identify the tendon with gentle resisted inversion/plantar flexion, then relax and compare tenderness along its accessible course.
  3. Assess the calf only with comfortable broad contact; document regional sensitivity without claiming selective deep-belly localization.

Document the findings

  • Distinguish tendon swelling/tenderness from calf sensitivity and record the familiar walking symptom.
  • A heel-rise deficit or changing arch is more informative than a claimed deep knot alone.

Limits and precautions

  • Avoid sustained pressure on the posterior tibial pulse or neural structures behind the malleolus.
  • Defer massage with unexplained swelling, suspected vascular disease or acute injury.
[1][2][3]

Examination and tests

2

Resisted inversion with slight plantar flexion[1][3]

Assess tibialis-posterior muscle-tendon loading tolerance.

Position
Seated with the leg supported and ankle slightly pointed down.
Technique
Turn the sole inward against gentle resistance while keeping the toes relaxed. Compare sides and record whether familiar pain occurs in the calf, retromalleolar tendon or navicular region.
Positive finding
Familiar tendon/medial-leg pain or reproducible weakness.
Interpretation
Pain localized along the tendon supports examining a tendon presentation and planning graded load.
Limitations
Other invertors contribute; this does not isolate the deep belly or classify deformity on its own.

Supported single-leg heel rise and hindfoot observation[1][3]

Assess foot support and plantar-flexor capacity during stance.

Position
Standing with fingertip balance support; start with both legs if a single-leg rise is unsafe.
Technique
Rise slowly onto the forefoot. Observe heel height, control, whether the heel moves toward inversion and the location of pain. Compare a consistent number of repetitions with the other side.
Positive finding
Inability to rise, reduced height/endurance or lack of expected hindfoot inversion with the familiar symptoms.
Interpretation
A deficit warrants tendon/foot assessment and helps set rehabilitation and support needs.
Limitations
Balance, calf weakness, arthritis and pain influence performance; one failed repetition is not a definitive diagnosis of tendon rupture.

Distinguishing other causes

Tibialis posterior tendinopathy or progressive collapsing foot deformity[3]

Findings that matter. Retromalleolar/navicular-region pain, swelling, reduced heel rise or a changing arch.

Next step. Assess tendon function, flexible versus fixed deformity and the need for foot/ankle referral or imaging.

Tarsal-tunnel or tibial nerve involvement[2]

Findings that matter. Burning, tingling, numbness or sensory change in the plantar foot needs a nerve examination.

Next step. Assess sensation, strength and proximal neurological causes; avoid prolonged pressure over the tunnel.

Navicular or other bone stress injury[4]

Findings that matter. Focal bone tenderness and progressively painful impact/weight bearing, particularly after a load increase.

Next step. Reduce impact and arrange clinical assessment; early radiographs may not reveal a stress injury.

Exertional or acute compartment syndrome[5]

Findings that matter. Predictable exertional tightness with neurological symptoms, or acute severe escalating pain and swelling.

Next step. Acute signs need emergency evaluation; recurrent exertional symptoms need a targeted specialist work-up.

Treatment selection and progression

Exercise and rehabilitation

Progressive loading for early tibialis posterior tendon disease[3]

Consider when. Assessed early-stage tendon dysfunction with an appropriate plan for foot support.

Begin tolerable resisted inversion/plantar flexion and supported heel rises. A clinician adjusts the movement to maintain control and avoid collapsing into an intolerable position.

Dose and review
Start below the current flare threshold and progress across weeks; the trial evaluated a 12-week program, not a fixed universal dose.
Progression
Increase resistance and heel-rise demand when walking and next-day symptoms remain stable.
Stop or reassess
Stop for a sudden loss of support or new swelling; reduce load if ordinary walking worsens persistently.
Evidence and limits
In 36 adults with stage I/II tendon disease, adding progressive resistance to orthoses/stretching improved pain and perceived function at 12 weeks. This is tendon evidence.

Clinician-delivered care

Footwear, orthosis or brace matched to the foot[3]

Consider when. An assessed tendon/foot presentation in which support improves standing or walking.

Assess shoe fit, flexibility of the deformity and whether a foot orthosis or ankle-foot brace reduces symptoms during a repeatable walk. Review pressure areas and comfort.

Dose and review
Wear time and support level are individualized, with an early fit check.
Progression
Reassess walking, skin and strength as activity expands; support and rehabilitation can be used together.
Stop or reassess
Review promptly for skin breakdown, numbness or worsening deformity.
Evidence and limits
Orthoses formed part of the early tendon-dysfunction trial; the trial does not identify one best device for every stage or prove a muscle trigger-point effect.

Self-care and activity

Adjust standing and walking exposure[3]

Consider when. Load-related symptoms without acute injury or vascular warning signs.

Break long standing periods and choose shorter level walks that do not leave the foot persistently worse. Restore hills and uneven terrain after basic walking improves.

Dose and review
Use the present comfortable duration as the starting point and review the next-day response.
Progression
Add duration or terrain difficulty separately while maintaining the strength/support plan.
Stop or reassess
Reassess if pain becomes focal over bone or support deteriorates despite a reduced workload.
Evidence and limits
Practical load management within a tendon rehabilitation pathway; this specific walking schedule has not been tested as a tibialis-posterior MPS treatment.

Clinician-delivered care

Botulinum toxin for diagnosed tibialis posterior spasticity[6]

Consider when. Neurological spasticity, such as after stroke, in which involuntary tibialis posterior activity interferes with foot placement, shoe/brace use or gait. Ordinary cramping, tendon pain and a tender point do not establish this indication.

A rehabilitation/spasticity specialist evaluates the whole limb, passive range, weakness and the role of each involved muscle. If appropriate, use guided muscle localization and pair treatment with rehabilitation or orthotic care to address foot placement, shoe/brace use or gait.

Dose and review
Drug selection and dose are prescribed individually. Agree on a review around 4–6 weeks and reassess before any repeat treatment.
Progression
Compare the agreed functional goal and adverse effects, not tone alone; a fixed contracture or weakness may need a different strategy.
Stop or reassess
Report new troublesome weakness or falls. Difficulty swallowing or breathing after toxin treatment requires urgent medical help.
Evidence and limits
The US label supports adult lower-limb spasticity. Its 468-person post-stroke trial used several muscles and followed participants for 12 weeks; benefits in ankle tone/global response at weeks 4/6 do not establish isolated-muscle pain relief or efficacy for MPS.

Reassessment and follow-up

  • Compare the same walking duration, heel-rise height/endurance and tendon swelling.
  • Review arch/hindfoot change and orthosis fit, not simply calf tenderness.
  • For spasticity, compare the chosen function and adverse weakness as well as tone.

Evidence and sources

  1. University of Washington Muscle Atlas: Tibialis posterior

    2026 · Institutional anatomy reference

    Undated anatomy page, verified September 2026; the year records this review. Supports attachments and actions, not diagnostic accuracy of palpation or a trigger-point map. No atlas illustration reproduced.

  2. Anatomy, Bony Pelvis and Lower Limb: Leg Posterior Compartment

    2026 · Anatomy reference

    Deep posterior compartment and neurovascular relationships; reviewed September 2026. Does not validate selective deep-muscle palpation or the legacy foot point coordinates.

  3. Nonsurgical management of posterior tibial tendon dysfunction with orthoses and resistive exercise: a randomized controlled trial

    2009 · Randomized trial

    36 adults with stage I/II tibialis posterior tendinopathy, 12 weeks; orthoses/stretching with or without concentric/eccentric resistance. Supports early tendon rehabilitation, not a muscle-release explanation for arch collapse.

  4. AAOS OrthoInfo: Stress Fractures of the Foot and Ankle

    2026 · Professional society clinical information

    Undated page verified September 2026; focal bone-load pain and the limits of early plain radiography.

  5. AAOS OrthoInfo: Compartment Syndrome

    2026 · Professional society clinical information

    Undated page verified September 2026; differentiates acute emergencies from exertional presentations. Muscle palpation cannot exclude either.

  6. BOTOX (onabotulinumtoxinA): US prescribing information

    2026 · Official prescribing information

    Adult lower-limb spasticity indication includes tibialis posterior, FHL and FDL. The 468-person post-stroke trial followed a multi-muscle protocol for 12 weeks; ankle tone/global response at weeks 4/6 cannot establish isolated tibialis posterior pain relief or an MPS indication.

Associated Trigger Points