The tarsal tunnel syndrome (TTS) represents a compression neuropathy in the lower extremities, relatively rarely diagnosed. Paresthetic and sensory disorders in the foot are more often associated with the presence of lumbosacral radiculopathy. Such a diagnosis should not be excluded although some cases might pertain to compression neuropathy of the posterior tibial nerve. A lesion at both levels -- double crush syndrome -- is also possible. A clinically suspected TTS may be confirmed by electrodiagnostic studies -- motor and sensory nerve conduction velocity, distal latency, amplitude of sensory nerve action potential. In 30 out of 51 cases with pronounced clinical symptoms an electroneuromyographic evidence of TTS was found. Ten cases were treated by physical therapy and in 8 of them there was a clinical and electroneuromyographic evidence of improvement.