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Mr Lucky JeyaseelanConsultant Trauma & Orthopaedic Foot & Ankle Surgeon
Patient information

Sinus tarsi syndrome

The sinus tarsi is a small tunnel on the outer side of the foot, just in front of the ankle bone.

Medically reviewed by Mr Lucky Jeyaseelan, Consultant Trauma & Orthopaedic Foot & Ankle Surgeon (GMC 6164291) · Last reviewed October 2026

What is it?

The sinus tarsi is a small tunnel on the outer side of the foot, just in front of the ankle bone. Pain here usually follows an ankle sprain or develops with flat feet.

What causes it?

  • Ankle sprains.
  • Flat feet.
  • Instability of the joint below the ankle.

Common symptoms

  • Pain on the outer side of the foot, in front of the ankle.
  • Pain on uneven ground.
  • A feeling of instability.

How is it diagnosed?

Diagnosis is by examination, MRI and sometimes a diagnostic injection.

Things you can do now

  • Wear supportive shoes and insoles
  • Avoid uneven ground while it is painful
  • Do balance exercises

Treatment

Treatment is tailored to your individual needs, symptoms and goals. Depending on your situation, it may include supportive footwear and insoles, physiotherapy, a guided injection and keyhole surgery to clean out the area.

Mr Jeyaseelan will talk you through the options that are right for you at your consultation.

When to see a specialist

  • Pain on the outer side of the foot below the ankle persists after a sprain
  • The ankle feels unstable
  • Physiotherapy hasn't helped

What to expect

Most cases settle with insoles, physiotherapy or a guided injection. Keyhole surgery helps the few that don't.

Common questions

Where can I see a specialist about sinus tarsi syndrome in London?

Mr Lucky Jeyaseelan, a consultant orthopaedic surgeon who specialises only in the foot and ankle, sees private and insured patients with sinus tarsi syndrome at Align Orthopaedics on Harley Street, The London Clinic on Devonshire Place, HCA London Bridge Hospital, HCA UK at The Shard, HCA UK City of London on Old Broad Street and The Holly Hospital in Buckhurst Hill, Essex. See all clinic locations or request an appointment.

Do I need a GP referral?

Self-funding patients can book directly, though a GP letter is helpful. Most insurers need a GP referral before they authorise your consultation, so check with yours first.

This information is general and is not a substitute for a medical consultation. Your diagnosis and treatment plan will be tailored to you.

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