Symptoms of iliopsoas muscle tension include lumbar soreness, lumbar stiffness and limited lumbar spine movement. 1. Lumbar pain: iliopsoas muscle tension can make the blood vessels inside the muscle become thin due to excessive muscle compression, resulting in ischemia and anaerobic metabolism of muscle fiber cells, producing a large amount of metabolic waste, and the accumulation of these metabolic wastes can cause lumbar pain. 2. Lumbar stiffness: iliopsoas muscle tension makes the lumbar muscles in a state of tension for a long time, unable to relax, the intuitive performance is the lumbar stiffness. 3. Restriction of lumbar spine activities: When iliopsoas muscle tension occurs, the tension of the muscle causes its pulling force and the degree of muscle stretch to change, and may cause pain to increase when moving, thus restricting the activities of the lumbar spine. When the symptoms caused by iliopsoas muscle tension worsen, you should go to the hospital in time for standardized treatment.