The tarsal tunnel is a passage found along the inner leg underneath the medial malleolus of the ankle.

[3] Tarsal tunnel syndrome is the most commonly reported nerve entrapment of the ankle.

It is caused by compression of the tibial nerve underneath the flexor retinaculum of the foot.

[1] People with tarsal tunnel syndrome have pain in the plantar aspect of the foot mostly at night.

Weight bearing increases pain and weakness is found on intrinsic foot muscles with positive Tinel sign at the tunnel.