Dr. Yi-Cheng Wu
中文

Avoiding Posterior Tibial Tendon Dysfunction: Understanding the Risks and Common Management Options

By Dr. Yi-Cheng Wu · Reviewed June 21, 2026

Posterior tibial tendon dysfunction is one of the main causes of adult flatfoot. Early conservative treatment can help avoid arch collapse and functional deterioration.

Posterior tibial tendon dysfunction (PTTD) is a degenerative injury of the posterior tibial tendon from overuse, marked by pain along the inner foot and behind the medial malleolus, sometimes with swelling, and often worse with prolonged standing, walking, running, or jumping. It is one of the main causes of acquired adult flatfoot deformity. Studies suggest it is more common in obese middle-aged women, and runners also have a certain incidence. It can usually be diagnosed clinically, and imaging is not always required. In stages one and two, management is mainly conservative, using orthotic insoles, calf stretching, and a structured exercise program, and early management can help prevent progression; when a fixed foot deformity develops in later stages, surgical reconstruction may need to be considered. The actual management still depends on your condition and a physician's assessment.

Home rehabilitation exercises for posterior tibial tendon dysfunction: 5 steps

  1. Sole-to-sole exercise

    Begin with a sole-to-sole movement, starting at 100 repetitions and gradually increasing to 300 as tolerated.

  2. Double-leg heel raises

    Rise on both feet and lower on both feet, with heels together, feet parallel, and knees fully extended; use your arms for support to keep balance if needed, and gradually build up to 50 repetitions.

  3. Resistance-band inversion exercise

    Do foot inversion training with a resistance band, starting with a yellow band and allowing brief rests early on, gradually building to 200 continuous repetitions, then progressing to orange or red bands.

  4. Resistance-band eversion exercise

    Do foot eversion training with a resistance band, likewise starting with a yellow band and allowing brief rests early on, gradually building to 200 continuous repetitions, then progressing to orange or red bands.

  5. Calf stretch

    Stretch the gastrocnemius and soleus with the toes pointing forward, not turned out, holding each stretch for 30 seconds and repeating 3 times.

The posterior tibial tendon is the main dynamic support for the medial arch of the foot. It produces foot inversion (moving the foot inward) and ankle plantarflexion (pointing the toes down). Degenerative injury of the posterior tibial tendon from overuse, also called posterior tibial tendon dysfunction (PTTD) or posterior tibial tendinopathy, is marked by pain along the inner foot and behind the medial malleolus (the inner ankle bone or bump), sometimes with swelling. Prolonged standing, walking, running, or jumping usually makes the pain worse.

In late-stage posterior tibial tendon dysfunction, the arch can collapse. At first this flatfoot is flexible (the patient can still form an arch), but in later stages it may become rigid and unable to form an arch.

The posterior tibialis originates from the posterolateral tibia, the posteromedial fibula, and the interosseous membrane. It passes through the deep posterior compartment of the lower leg, and its tendon runs behind the medial malleolus, where the tendon’s blood supply is poorest and rupture most commonly occurs. Near its distal attachment, the tendon divides into main, plantar, and recurrent parts. The main part attaches to the navicular tuberosity; the plantar part attaches to the second, third, and fourth metatarsals, the second and third cuneiforms, and the cuboid; and the recurrent part attaches to the sustentaculum tali of the calcaneus.

Epidemiology

  • Earlier studies estimated the incidence of posterior tibial tendon dysfunction in runners at 2.3 to 3.6%.
  • Posterior tibial tendon dysfunction usually occurs in obese middle-aged women, with an incidence of up to 10% in this group.
  • Conditions such as diabetes, hypertension, obesity, prior surgery, foot or ankle trauma, and corticosteroid use are found in up to 60% of patients.
  • Posterior tibial tendon dysfunction is one of the main causes of adult flatfoot deformity.

Risk factors

  • Diabetes, hypertension, obesity, prior surgery
  • Increased training or a change in type of exercise
  • Foot surgery or accidental trauma, and severe foot inversion with a plantar valgus deformity
  • Possible association with rheumatoid arthritis and seronegative inflammatory conditions
  • Prior corticosteroid use; local injection is a possible cause of tendon rupture

History

  • Initially, rising onto the toes is normal but painful; as the condition progresses, the gait changes and the patient becomes unable to rise onto the toes.
  • Pain along the posterior tibial tendon, especially near the medial malleolus and the medial arch, occasionally radiating to the medial lower leg.
  • Symptoms usually worsen with prolonged or vigorous activity, especially activities with strong push-off.

The condition can be divided into three stages:

  • Stage one: mild swelling, medial malleolar pain, and normal but painful toe-raising, with no foot or ankle deformity.
  • Stage two: flattening of the arch, hindfoot still mobile, midfoot abduction, and tendon dysfunction or rupture, with an inability to rise onto the toes.
  • Stage three: the signs of stage two worsen, but the hindfoot deformity becomes fixed and flat.

Physical examination

  • Tenderness of the posterior tibial tendon, especially behind the medial malleolus.
  • Swelling of the foot near the medial malleolus.
  • Clear flattening of the medial longitudinal arch compared with the unaffected foot.
  • Increased hindfoot valgus: more toes are visible when the patient is viewed from behind (the “too many toes sign,” a later finding).
  • Single-leg heel-raise test: the patient stands on the affected foot and tries to raise the heel while the other foot is off the ground. With tendinopathy, the patient can raise the affected heel but with pain. Repeated heel raises may reveal some weakness and pain in the tendon, and the hindfoot stays in valgus throughout the toe-raise.
  • Abnormal tendon strength testing: plantarflex and evert the foot, then resist the patient’s attempt to invert it (avoid dorsiflexion, because the tibialis anterior can assist foot inversion).

Diagnostic tools

  • The diagnosis can be made clinically, and imaging is not always required.
  • Plain radiographs are usually normal but may show subtle angular changes in early stages; weight-bearing anteroposterior and lateral views of the foot, plus anteroposterior, lateral, and mortise views of the ankle, are used.
  • Some studies suggest that in the hands of an experienced physician, high-resolution ultrasound may be more accurate than MRI for diagnosing posterior tibial tendon dysfunction; ultrasound can assess tendon size, look for tendon degeneration, and detect fluid in the tissue around the tendon, which can appear in the early stages of PTTD.
  • MRI can determine the condition of the tendon and surrounding muscles, and in later stages it can be used to plan surgical treatment.

Conservative treatment

  • Early treatment is essential to prevent progression from stage one to stage two or three. For patients in stage one or two, use insoles, calf stretching, and a structured exercise program.

  • The main focus is pain control, because inflammation is mostly present only in the early symptomatic stage. Local corticosteroid injection into the tendon sheath is not recommended, as it is associated with tendon rupture; prolotherapy injection may be considered to reduce symptoms.

  • Conservative treatment includes:

  • Education: the 5A framework for behavioral counseling — Assess, Advise, Agree, Assist, and Arrange.

  • Reducing load: wear supportive shoes and choose footwear that provides extra arch support, avoiding shoes that may raise injury risk, including high heels, thick-soled shoes, and flip-flops. Use over-the-counter (OTC) or custom medial arch insoles, and take relative rest (cross-training such as endurance running or swimming); insoles with ankle support and medial longitudinal arch support are recommended.

  • Reloading: reload in a controlled way, focusing on concentric or eccentric exercise, transitioning to weight-bearing training (such as underwater treadmill training), and gradually weaning off the insoles.

  • Prevention: return to activity gradually to prevent progression and recurrence.

  • Therapeutic exercise:

  • Sole-to-sole: start at 100 repetitions and gradually increase to 300.

  • Double-leg heel raises: gradually build up to 50 repetitions. Rise on both feet and lower on both feet. Use your arms for balance support, with the knees fully extended and the feet parallel and heels together.

  • Resistance-band inversion exercise: gradually build up to 200 repetitions. Allow brief rests at first, gradually building to 200 continuous repetitions, starting with a yellow band and progressing to orange or red.

  • Resistance-band eversion exercise: gradually build up to 200 repetitions. Allow brief rests at first, gradually building to 200 continuous repetitions, starting with a yellow band and progressing to orange or red.

  • Gastrocnemius/soleus stretch: hold each stretch for 30 seconds and repeat 3 times, with the toes pointing forward, not turned out.

Surgery

  • Stage one or two should be managed conservatively for about 3 to 4 months before surgery is considered:
    • Tendon sheath release, scar tissue excision, and partial synovectomy are typical surgical approaches.
    • Endoscopic surgery within the posterior tibial tendon sheath has been associated in studies with reduced pain and a reduced need for more invasive surgery.
  • In stage three there is a fixed deformity, and tendon reconstruction cannot resolve the problem. Subtalar joint or joint fusion is usually needed to improve symptoms. Relative contraindications to surgery include joint hypermobility, neuromuscular disease, severe subtalar arthritis, relative obesity, and age over 60 to 70 years.

Prognosis

  • The recurrence rate after conservative treatment is 50 to 75%.
  • The recurrence rate after surgical treatment is 5 to 20%.
  • Daily activities can typically be resumed within 3 to 4 months after surgery, and a full return to sport within 6 to 18 months.

References

Further reading

Frequently asked questions

Who needs to pay more attention to posterior tibial tendon dysfunction?

Studies suggest that posterior tibial tendon dysfunction is more common in obese middle-aged women, with an incidence of up to about 10% in this group, and runners also have a certain incidence. Conditions such as diabetes, hypertension, obesity, a history of foot or ankle trauma or surgery, and prior corticosteroid use are also seen more often in patients.

What are the common management options?

In stages one and two, management is mainly conservative, including supportive orthotic insoles, calf stretching, and a structured exercise program, together with relative rest and progressive reloading to restore activity. If about 3 to 4 months of conservative treatment does not improve symptoms, or the condition has progressed to a fixed deformity, surgery may need to be considered. The actual approach still depends on your condition and a physician's assessment.

When should you seek medical evaluation?

If you have persistent pain along the inner foot or behind the medial malleolus, pain or weakness when rising onto your toes, or a gradually flattening arch, it is advisable to seek medical evaluation. Early treatment is important for preventing progression from stage one to stages two and three.

This article is also available in the original Chinese, with the full reference list.

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