Quick Answer: Sciatica is pain that travels from the lower back or buttock down the leg — caused by compression or irritation of the sciatic nerve. The most common causes are a lumbar disc bulge, piriformis syndrome, or sacroiliac joint dysfunction. True sciatica is not just "back pain" and requires specific clinical assessment to identify the source. At Marques Therapy, 88 Southwark Bridge Rd, London SE1, Sosthenes Marques uses sports therapy, dry needling, and joint mobilis
