First, it is a type of chronic pain without obvious causes, mainly characterized by soreness and swelling. The pain usually alleviates after rest but reappears if staying in one position for too long. Therefore, patients with myofascial inflammation caused by lumbar strain often feel restless. Second, there is usually a trigger point, typically located near or within a muscle, or at the junction between muscle and nerve. Pressing on the trigger point often results in radiating pain around it. Furthermore, the pain usually does not worsen but instead lessens over time, which is a key characteristic of myofascial inflammation. Third, the sacrospinalis muscle may become hardened or even spasm on one or both sides. Fourth, there is compensatory abnormal curvature of the spine, mainly presenting as protrusion or lateral curvature of the spine. Thus, the symptoms of myofascial inflammation from lumbar muscle strain usually include pain, specific pain points, surrounding muscle hardening, spasm, and compensatory spinal deformity.