Dehydration and bulging are exacerbating disc changes causing muscle spasms to occur along the spine. That is why you get to feel pain, and stiffness, and the nerves are more sensitive. The possible fixes involve some physical therapy procedures, anti-inflammatory drugs, and, if necessary, cor searches for tumor syndrome. Then things such as upright posture, free movement exercises, and heat therapy will also be beneficial. Please make sure that you visit an orthopedist consultation, and personalized treatment for you is also necessary.