Soleal sling syndrome is an entrapment or impingement of the tibial nerve at the upper back of the leg where the tibial nerve passes through the fascia that attaches the soleus muscle to the tibia and fibula (the soleal sling).
The typical symptoms of soleal sling syndrome is pain on palpation at the upper end of the calf muscle. There is often numbness on the bottom of the foot and there may be pain in the foot. The muscles that move the big toe are often weaker.
The really only known effective treatment of this is a surgical decompression of the fascia tissue around the nerve.