Back pain has affected millions of people around the world. Back pain is caused from trauma, injuries, inappropriate bending and lifting, and disease. Back pain is common, yet some people suffering back pain for a few short months, it disappears and is never felt again. Others will feel the pain daily for the course of their lifetime. What causes back pain? First, we must consider the muscles and nerves in back pain, as well as particle muscle diseases to answer the question correctly.