The MSK Specialist

What does “lower back pain feels like it’s locking” mean? When lower back pain feels like it’s locking, the spine or pelvis briefly feels stuck or jammed when you move—often after sitting or when standing up. This usually reflects facet joint irritation, sacroiliac joint dysfunction , and/or muscle spasm that limits the glide of the small joints, rather than a pinched nerve from a slipped disc. Why your “back locks up when I stand” — common triggers Rising from a chair, twisting to reach, or taking first steps after waking Prolonged sitting or long drives Deconditioning, recent over-exertion, or an awkward lift You may also notice short, sharp catches, stiffness, or a protective lean. These patterns are typical of mechanical pain sources. Common Causes 1) Facet Joint Irritation (Facet Arthropathy) Facet joints are small paired joints at the back of each spinal level. Inflammation here can cause localised low back pain, stiffness and spasm, which can feel like a “lock” during movement. ...