Sciatica is a condition that results when the sciatic nerve becomes irritated. Bulging discs, spinal subluxations, and muscle spasms can all cause increased pressure on the sciatic nerve. When this happens it causes pain, numbness, and weakness in the lower back and leg. To properly treat sciatica the cause of the condition needs to be diagnosed and properly treated. Your chiropractor can help you do this. Pinched Nerve When a nerve is squeezed or compressed it is called a "pinched nerve". This can be caused by spinal misalignments, bulging or herniated discs, or other factors. The increased pressure on the nerve causes inflammation, pain, and sometimes muscle spasms. The pressure on the nerve must be relieved in order to alleviate the pain. An examination can reveal the cause of the pain, and an adjustment can relieve the pain by properly aligning the spine and addressing the cause of the pain.