Tarsal Tunnel vs Plantar Fasciitis

Tarsal tunnel syndrome and plantar fasciitis are the two most commonly confused causes of plantar heel pain — and the confusion is clinically understandable, as both produce medial heel pain that worsens with prolonged standing and walking. The critical distinguishing features are neurological in tarsal tunnel syndrome and mechanical in plantar fasciitis. Plantar fasciitis produces sharp, stabbing pain localized to the medial calcaneal tuberosity that is classically worst with the first steps in the morning, improves after several minutes of walking, and worsens again after prolonged activity — without any neurological symptoms such as burning, tingling, numbness, or electric sensations. Tarsal tunnel syndrome, by contrast, produces burning, tingling, or electric shock pain that radiates along the medial ankle and plantar foot following the posterior tibial nerve distribution — often worsening with prolonged standing, aggravated by ankle dorsiflexion, and frequently present at night or at rest when mechanical load is absent, distinguishing it clearly from the load-dependent pain of fasciitis. At Healthy Feet Podiatry, our NYC specialists use Tinel’s sign testing over the tarsal tunnel, diagnostic ultrasound of both the plantar fascia and posterior tibial nerve, and nerve conduction studies when neurological involvement is suspected to separate these diagnoses definitively — because treating fascial inflammation in a patient with nerve compression, or vice versa, produces no improvement and delays appropriate care by months.