Muscles can become too tight due to lack of exercise, too much exercise, structural imbalances, dehydration and electrolyte loss, or any combination thereof. In contrast, some muscle groups are too weak. When muscular imbalances become chronic aberrant forces are transmitted to the spine. Consequently, one movement outside of the norm can trigger an injury to a spinal joint, ligament, or disc resulting in spasm and pain.
Your physiotherapist will use all techniques to calm your muscles down: manual therapy to decrease tensile stiffness, joint mobilizations to improve joint mobility and regain range of motion, exercises and stretches to gradually return you to function, and most of all, reassurance that you will get through this.