Depending on the severity, you may be able to readjust the frame. This is best done with the help of another person. Open your backdrop and have your helper stand on the opposite side of the background. Grasp opposite ends of the frame and gently pull away from each other. This action moves the binding back into place inside the fabric edge. You may need to walk around the entire backdrop performing this process. When you can lay it flat on the ground with no edges risen from the floor you will know it is fixed!