Are you dealing with shooting pains or numbness from sciatica? Discomfort is caused when the sciatic nerve (which runs from the lower spine down the back of each leg) gets pinched. It can be caused by an injury such as a slipped disk or pelvic fracture, pregnancy, or tight muscles in the lower back, hips, and legs. Whether you feel yours at night or after sitting or standing for a long time, relief is just a yoga mat away with these eight poses.