• Sensation changes
  • Of the back of the calf or the sole of the foot
  • Numbness, decreased sensation
  • Tingling, burning sensation
  • Pain, may be severe
  • Abnormal sensations
• Weakness of the knee or foot
  • Difficulty walking
  • Inability to move the foot (in severe cases)
  • Inability to bend the knee (in severe cases)

Sciatica might be revealed by a neuromuscular examination of the legs by a physician. There may be weakness of knee bending of foot movement, or difficulty bending the foot inward or down. Reflexes may be abnormal, with weak or absent ankle-jerk reflex.

Tests that reveal sciatic nerve dysfunction may include:

• EMG (a recording of electrical activity in muscles)
• Nerve conduction tests

Tests are guided by the suspected cause of the dysfunction, as suggested by the history, symptoms, and pattern of symptom development. They may include various blood tests, X-rays, MRIs, or other tests and procedures.