The sciatic nerve is the longest and largest nerve in the body, and runs from the low back to the feet. Most common causes of sciatica pain include disc problems or degeneration. Symptoms of sciatica include pain, numbness, tingling, and weakness in the buttocks, thighs, or calves. Pain may be a dull ache or constant severe sharp shooting pain. Chiropractic helps sciatica by utilizing joint manipulation, therapy modalities, massage, stretching, and rehab programs.