If there is no pain, and the numbness is limited only to one ankle region, it is advisable that you do an EMG-NCV (Electromyography-Nerve Conduction Velocity) test, which documents the quality and quantity of electrical conduction through different nerves and the electrical activity of muscles. If this test shows that conductions in the nerves on the affected side are normal, you should see an orthopedic surgeon.A word of caution: Though many centres claim to do this test, very few have qualified technicians and reporters (electromyographers).