The sciatic nerve is a bundle of nerves that make up the longest nerve in the body. There is one that travels down the back of each leg. Its function in the body is to connect muscles with the spinal cord and provide sensation and strength to your legs. When pressure is applied to the sciatic nerve, you may experience muscle pain, weakness, and numbness. This pressure could be caused by a subluxation, a slipped or herniated disc, piriformis syndrome, or just daily wear and tear. Other factors that can increase a person’s risk for experiencing sciatic pain are obesity because the extra body weight can affect spinal health, as well as prolonged sitting during the workday.