Tinel's Sign at the Foot and Ankle: How to Detect Nerve Entrapment

If a client or patient tells you they feel tingling, "electric shocks," or burning in the sole of the foot, especially after standing for a while or running, it's worth ruling out nerve entrapment before continuing to program impact training. Tinel's sign at the foot/ankle is one of the quickest tools to point you in the right direction.

What does this test measure?

Tinel's sign evaluates a peripheral nerve's sensitivity to tapping. At the ankle, it's typically applied over the posterior tibial nerve, as it passes through the tarsal tunnel (behind and below the medial malleolus). If the nerve is irritated, compressed, or in the process of regenerating, tapping reproduces tingling in the area it supplies (sole of the foot, toes).

It's the classic screening test for tarsal tunnel syndrome, the ankle's equivalent of carpal tunnel syndrome at the wrist.

Equipment needed

• Nothing essential
• Optional: a reflex hammer, or your index/middle finger for tapping

Step-by-step protocol

1. Have the person sit or lie down, with the ankle in a relaxed position and slightly everted to better expose the tarsal tunnel
2. Locate the medial malleolus and move slightly back and down to the tarsal tunnel area (between the malleolus and the Achilles tendon)
3. Apply gentle, repeated taps (4-6 taps) with your finger or a reflex hammer over that area
4. Ask the person whether they feel tingling, an "electric shock," or a shooting sensation radiating into the sole of the foot or toes
5. Repeat on the other side to compare sensations

Common mistakes

• Tapping too hard (can cause local pain with no diagnostic value)
• Not specifically asking about distal radiation (local pain at the tapping site doesn't count as positive)
• Not comparing with the healthy side, especially in people with high baseline sensitivity

How to interpret the result

Result	Interpretation
Negative	No radiating tingling reproduced — posterior tibial nerve entrapment in this area is unlikely
Positive	Tingling/shock radiating into the sole of the foot or toes — suggests irritation or compression of the posterior tibial nerve (tarsal tunnel)

A positive Tinel's sign is a suggestive finding, not a diagnosis. If it occurs alongside night pain, persistent tingling, or weakness of the foot's intrinsic muscles, refer for medical assessment (which may include nerve conduction studies or ultrasound).

Related tests

Tinel's sign is often combined with other ankle tests when neuropathic or mechanical ankle pain is suspected:

• Anterior Drawer Test for the Ankle — to rule out associated ligament laxity if there's a history of a sprain
• Talar Tilt Test — completes the assessment of lateral ligament stability

Record and track it

Tingling related to nerve entrapment tends to fluctuate with training load, footwear, or changes in volume. With Movalytics you can log the Tinel's sign result at each assessment, along with a description of the symptoms, and track how things evolve as you adjust the training plan or footwear.

FAQ

Is Tinel's sign painful? The tapping can cause mild, momentary discomfort, but it shouldn't be painful in itself. What matters is whether it reproduces radiating tingling, not the local pain from the tapping. Does a negative Tinel's sign rule out tarsal tunnel syndrome? Not completely. It has limited sensitivity, so a negative result doesn't rule out the problem if the clinical picture (symptoms, history) remains suggestive. Can I run this test if the client already has a diagnosed neuropathy? Yes, as part of ongoing monitoring, but always in coordination with the medical professional managing the case, and without replacing their assessment.