Fibular tunnel syndrome is the most common tunnel syndrome of the lower extremity. The compression of the peroneal nerve leads to motor and sensory disorders, which is manifested by weakness of the muscles that normally provide dorsiflexion of the foot and toes, abnormal gait, and loss of sensitivity. The paper presents the etiology, pathogenesis, and clinical picture of this disease. Particular attention is paid to modern methods of treating this pathology. Decompression of the common peroneal nerve is an effective and safe treatment for fibular tunnel syndrome. At the moment, the majority of clinicians do not associate the clinical manifestations with damage to the peroneal nerve, which leads to diagnostic errors and, as a result, to incorrect treatment tactics and a decrease in the patients’ quality of life for a long time.