Fortunately, most patients with tarsal tunnel syndrome improve with appropriate non-surgical treatment. Activity modification, footwear optimisation, orthotic therapy where indicated, rehabilitation and treatment of the underlying cause are often successful in reducing pressure around the posterior tibial nerve. Surgery is therefore reserved for carefully selected patients whose symptoms persist despite comprehensive conservative management or when a clearly identifiable structural abnormality is compressing the nerve.
The most important consideration before recommending surgery is confidence in the diagnosis. Tarsal tunnel syndrome shares many symptoms with plantar fasciosis, Baxter's nerve entrapment, lumbar radiculopathy and diabetic peripheral neuropathy. If the diagnosis is uncertain, surgery should be delayed until the true source of the symptoms has been established. Operating on the wrong condition is unlikely to relieve pain and may expose the patient to unnecessary risks.
Before considering surgery, a detailed reassessment is often appropriate. Clinical examination, diagnostic ultrasound and MRI may identify a ganglion cyst, enlarged vein, accessory muscle, tendon pathology or postoperative scar tissue compressing the nerve. These structural abnormalities are particularly important because they may be corrected surgically with a reasonable expectation of relieving nerve compression.
The goal of surgery is to decompress the posterior tibial nerve. This is usually achieved by releasing the flexor retinaculum, the strong ligament forming the roof of the tarsal tunnel, thereby creating more space for the nerve. If another structure is responsible for the compression, such as a ganglion cyst or scar tissue, this is also addressed during the procedure. The exact surgical technique depends on the underlying pathology identified during the assessment.
Unlike surgery for plantar fasciosis, the objective is not to release the plantar fascia but to relieve pressure on the nerve while preserving its normal function. This distinction highlights the importance of an accurate diagnosis because each operation is designed to treat a different anatomical problem.
As with any surgical procedure, potential complications exist. These include wound infection, delayed healing, bleeding, persistent pain, scar sensitivity, nerve injury, numbness, complex regional pain syndrome and failure to achieve complete symptom relief. Although serious complications are uncommon, patients should understand that nerve surgery cannot guarantee full recovery, particularly if the nerve has been compressed for a prolonged period.
Recovery following surgery is usually gradual. Patients often protect the foot during the early healing phase before progressively increasing weight-bearing and rehabilitation. Because nerves heal more slowly than many other tissues, improvements in sensation and pain may continue for many months after the operation. Patience is important, particularly for patients who have experienced longstanding symptoms before surgery.
Published evidence suggests that the best surgical outcomes occur in patients with a clearly established diagnosis, a relatively short duration of symptoms and an identifiable cause of nerve compression. Patients undergoing surgery for ganglion cysts or other discrete structural lesions generally experience more predictable results than those with diffuse nerve irritation without an obvious cause. Early intervention before permanent nerve damage develops may also improve outcomes in carefully selected cases.
Conversely, patients with widespread neuropathy, poorly controlled diabetes or pain originating from the lumbar spine are less likely to benefit from tarsal tunnel decompression because the nerve compression is not the primary source of their symptoms. Careful patient selection is therefore one of the strongest predictors of surgical success.
Ultimately, surgery should be considered only after an accurate diagnosis has been established and appropriate non-surgical treatment has failed. For the majority of patients, conservative management remains effective. When surgery is indicated, it should be performed as part of a comprehensive treatment plan that includes postoperative rehabilitation and management of the underlying mechanical factors contributing to nerve compression.