How long does a cortisone injection take to work for tarsal tunnel syndrome?

Tarsal tunnel syndrome involves pressure or irritation affecting the posterior tibial nerve near the inside of the ankle. An injection may reduce local inflammation around the nerve, but it may not remove pressure caused by footwear, swelling, an injury, or another source. Tingling and burning can take time to settle, and numbness or weakness deserves careful follow-up. Any immediate altered feeling may come from local anaesthetic rather than the steroid.

Follow instructions about activity after the injection. Choose footwear that does not press on the inner ankle, avoid sudden increases in walking or running, and use prescribed exercises or orthoses as directed. Check the foot for changes in sensation or skin condition if it feels numb, and avoid heat or pressure that you cannot feel properly.

Contact your clinician if burning, tingling, or pain is worsening, or if the injection area becomes increasingly red, swollen, or hot. Seek prompt assessment for new or progressing weakness, difficulty moving the foot, or loss of balance. Urgent help is needed for breathing difficulty or facial swelling after the injection.

Ask what response to monitor, when walking and exercise can increase, whether nerve testing or imaging is needed if symptoms persist, and which footwear changes are suitable for you.