When your lower back suddenly locks up, it’s not just painful — it can be quite frightening. Not being able to move properly can significantly limit your work and day-to-day life.
You might find yourself stuck in a protective, slightly bent posture, unable to straighten up. This is common with facet joint irritation in the lower lumbar spine, particularly around L3–L5.
Let’s unpack why this happens and how you can safely start moving again.
Identifying Facet Joint Pain
Facet joint irritation often flares with extension (leaning backward) or rotation.
If extending your back or twisting increases central lower back pain, it may point more towards a facet joint issue rather than a disc problem.
What to Avoid
Try to avoid movements and positions that load the spine into extension:
- Prolonged standing (especially in high heels), which can compress and overload the facet joints
- Sleeping on your stomach, particularly on a soft mattress
- Repeated or sustained leaning backward
- Explosive rotation (e.g. a golf swing)
In short — avoid positions that “close down” and load the joints in your lower back.
Relief Exercises
The goal here is to gently open up the joints, reduce muscle guarding, and restore movement.
1. Walking
Walking creates a gentle cross-rotation between the shoulders and hips.
→ This movement may help loosen guarding muscles along the lower back and gradually restore mobility.
2. Knees to Chest
Lie on your back and gently bring your knees towards your chest.
→ Helps create flexion and open the facet joints.
3. Child’s Pose
Kneel and sit back on your heels while reaching your arms forward.
→ Gently stretches and decompresses the lower back.
4. Happy Baby Pose
Lie on your back, hold your feet, and gently rock side to side.
→ Encourages deeper hip and lower back flexion.
5. Gentle Spinal Twist
Bring one leg across your body while extending the opposite arm.
→ Adds gentle rotation and traction through the spine.
6. Lacrosse Ball Release
Place a lacrosse ball under the lower back muscles and gently roll side to side.
→ Helps reduce muscle tension and guarding.
7. Supported Hanging / Traction
Hang off parallel bars or a sturdy surface (like chair backs), letting your lower body relax.
→ Add gentle side-to-side hip movement for traction.
Conclusion
A locked-up lower back can feel scary. Often, the reduced movement occurs because your body has gone into a protective state.
This holding pattern has some merit in the short term, but it can limit long-term healing if it persists.
The key to a fast and full recovery is to gently restore movement, avoid aggravating positions, and give the area a chance to settle.
If symptoms persist, worsen, or don’t improve over a few days, it’s a good idea to get it properly assessed by your chiropractor.