Tarsal Tunnel Syndrome – Nerve Compression at the Ankle

Tarsal Tunnel Syndrome – Nerve Compression at the Ankle If you're experiencing burning pain, tingling, or numbness in your foot that seems to come from deep inside your ankle, you might have tarsal tunnel syndrome. This condition involves compression of the posterior tibial nerve as it passes through a tight space (the tarsal tunnel) behind your ankle. It's often misdiagnosed or overlooked, but understanding what's happening and getting proper treatment can provide significant relief. What Is Tarsal Tunnel Syndrome? The tarsal tunnel is a narrow space on the inner side of your ankle created by bone and ligament. The posterior tibial nerve, along with blood vessels and tendons, travels through this tunnel. When something compresses this nerve, it can cause pain, tingling, and numbness in your foot—a condition we call tarsal tunnel syndrome. This is similar to carpal tunnel syndrome in the wrist, but it occurs in the ankle. The condition can affect your entire foot or just specific areas depending on where along the nerve the compression occurs. Causes of Tarsal Tunnel Syndrome Nerve compression in the tarsal tunnel can result from: Flat feet (overpronation): When your foot rolls inward excessively, it can stretch the nerve Ankle swelling: Inflammation from arthritis, tendinitis, or other causes takes up space in the tunnel Varicose veins: Enlarged veins in the tunnel compress the nerve Cysts or ganglions: Benign growths can occupy space in the tunnel Tight ligaments: The flexor retinaculum (ligament covering the tunnel) may be too tight Previous ankle injury: Swelling or scar tissue from a past sprain or fracture Repetitive stress: Runners and dancers experience repeated trauma to the ankle Tight shoes: Wearing shoes that compress the inner ankle area Pregnancy related swelling: Water retention and weight gain increase swelling Obesity: Extra weight increases pressure on foot structures Symptoms of Tarsal Tunnel Syndrome You might experience: Burning, tingling, or "pins and needles" sensation in the foot Numbness in the sole of your foot or toes Pain on the inner side of your ankle Symptoms that may radiate into your heel, arch, or toes Pain that worsens with activity or prolonged standing Symptoms often worse at night Difficulty sleeping due to foot discomfort Swelling on the inner ankle Weakness in your foot (in advanced cases) Diagnosis Your podiatrist will perform several tests to confirm tarsal tunnel syndrome: Physical Examination Assess for swelling along the nerve path Perform Tinel's sign test—tapping the nerve to reproduce symptoms Check for abnormal foot structure (flat feet, excessive pronation) Evaluate strength and sensation in your foot Imaging Studies Ultrasound can visualize the nerve and identify space occupying lesions. MRI provides detailed images of soft tissue, nerves, and any masses. Nerve conduction studies and EMG (Electromyography) measure how well your nerve transmits electrical signals and can confirm nerve compression. Blood Work Blood tests may rule out systemic conditions like thyroid disease or diabetes that can cause similar symptoms. Treatment Options for Tarsal Tunnel Syndrome Conservative Management If caught early, non surgical treatment often provides relief: Rest: Limit activities that aggravate your symptoms Ice: Apply ice to reduce swelling Elevation: Prop your foot up to minimize swelling Activity Modification: Avoid running or high impact activities; opt for swimming or cycling Anti Inflammatory Medications: NSAIDs like ibuprofen reduce inflammation Custom Orthotics: Specially designed insoles correct overpronation and support your arch Proper Footwear: Avoid tight shoes; choose those with good support and room in the ankle area Night Splint: Keeps your foot in a neutral position while sleeping Physical Therapy: Stretches and exercises reduce tension Corticosteroid Injection: Can reduce inflammation around the nerve Advanced Non Surgical Options Platelet Rich Plasma (PRP): May reduce inflammation and support nerve healing Radiofrequency Ablation: Can reduce pain signals from the affected nerve Surgical Treatment If conservative care doesn't provide relief within 3 6 months: Tarsal Tunnel Release (Decompression): The surgeon releases the ligament covering the tunnel or removes space occupying lesions, relieving pressure on the nerve. Success rates for symptomatic relief are 60 90%. When to See a Podiatrist Schedule an appointment if: You experience persistent burning, tingling, or numbness in your foot Symptoms are worse at night or with activity Home treatments haven't provided relief You suspect your foot structure might be contributing to the problem You're considering any form of treatment and want professional guidance Prevention Strategies To reduce your risk of tarsal tunnel syndrome: Maintain a healthy weight to minimize pressure on foot structures Wear supportive shoes with good arch support and adequate space Address flat feet with custom orthotics if neede