Top 7 Natural Ways To Help Getting Relief From Sciatica Sciatica is the irritation, inflammation and compression of the nerve which runs to the lower back and legs. Sciatica usually irritates the sciatic nerves, which involve tingling and numbness. Nerves are the cables which carry electrical impulses between the brain and the rest of the body. Nerve cells are known as Neurons and they are present all over the body, especially in the brain and spinal cord. There are two