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.