Tarsal Tunnel Syndrome: Causes, Symptoms, Treatment, and the Impact of Barefoot Footwear

A less common, but unpleasant foot condition is tarsal tunnel syndrome (TTS), also known as posterior tibial neuralgia. It is a neuropathic condition characterized by the compression of the tibial nerve or its branches as they pass through the tarsal tunnel. This tunnel is a narrow space located on the inside of the ankle, bounded by bones and a fibrous band (flexor retinaculum). TTS can have a significant impact on a patient's quality of life as it causes pain, tingling, and numbness in the foot area.

Causes of Tarsal Tunnel Syndrome

TTS can be caused by a number of factors that lead to a reduction of space in the tarsal tunnel and subsequent compression of the tibial nerve. The most common causes include:

  • Anatomical abnormalities: Ganglion cysts, lipomas, varicosities (varicose veins), or exostoses.
  • Inflammatory conditions: Synovitis, tendinitis, or arthritis.
  • Traumatic events: Ankle fractures, severe sprains, or post-surgical scarring.
  • Systemic diseases: Diabetes mellitus or hypothyroidism.
  • Biomechanical factors: Flat feet and excessive pronation (rolling of the ankle inward).

Symptoms

The clinical presentation of TTS varies depending on the degree of compression and the affected nerve fibers. Typical symptoms include:

  • Pain: Burning, shooting, or dull pain in the area of the ankle, heel, foot, and toes, which worsens with activity or at night.
  • Paresthesia: Tingling, "pins and needles," and numbness on the sole of the foot and the big toe.
  • Muscle weakness: Weakening of the foot muscles, leading to problems with walking and balance.
  • Sensory disturbances: Reduced ability to perceive heat, cold, or pain in the affected area.

Diagnosis and Treatment

Diagnosis of TTS involves a thorough medical history, physical examination (including the Tinel sign—tapping on the nerve in the tarsal tunnel area), and electrophysiological studies (EMG, NCV).

Treatment depends on the severity of symptoms and the primary cause. A conservative approach includes:

  • Modifying physical activity and rest.
  • Physical therapy (stretching, strengthening, joint mobilization).
  • Orthopedic insoles or braces to correct foot posture.
  • Pharmacological treatment (anti-inflammatory drugs, medication for neuropathic pain).

If conservative treatment is ineffective, surgical intervention (tarsal tunnel release) may be considered.

Prevention of Tarsal Tunnel Syndrome

Although there is no guarantee that TTS can be completely prevented, following these measures can significantly reduce the risk of its development:

  • Proper footwear: Wear comfortable shoes that do not press on the ankle area and provide sufficient room. Avoid high heels and excessively tight shoes.
  • Ergonomics of movement: When working while standing, take regular breaks. Avoid prolonged sitting with crossed legs, as this increases pressure on the nerves in the ankle.
  • Exercise and stretching: Regularly strengthen and stretch the ankle and calf muscles (walking on heels, calf raises). Yoga or Pilates are also excellent for flexibility.
  • Healthy lifestyle: Maintain an optimal weight to prevent excessive pressure on joints and nerve pathways.

Barefoot footwear and TTS

The effect of barefoot footwear on tarsal tunnel syndrome is not clear-cut and requires further research. Some findings suggest that barefoot shoes can improve proprioception (perception of body position) and strengthen foot muscles, which may act as a preventive measure. On the other hand, for patients with advanced inflammation or severe compression, a rapid transition to thin soles may increase strain and temporarily worsen symptoms. For this reason, consulting a doctor or physical therapist is always key when dealing with this condition.

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"Tarsal tunnel syndrome is a complex condition that requires an individualized approach to treatment. Early diagnosis and appropriate care can help alleviate pain and prevent permanent nerve damage."

International professional sources:
• American Academy of Orthopaedic Surgeons (AAOS)
• National Institute of Neurological Disorders and Stroke (NINDS)
• Journal of Orthopaedic & Sports Physical Therapy (JOSPT)

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