What Causes Low Back Pain: How It Works, Explained Simply

Video Transcript

Low back pain is one of the most common reasons people see a doctor. For most, it is not a sign of serious damage. Your lower back is a stack of building blocks: bony vertebrae, cushioning discs between them, and small joints at the back called facet joints. Strong ligaments and deep muscles wrap the whole column, holding it steady as you bend, twist, and lift. In cross-section you can see how they fit. The disc sits in front, the nerves pass through a canal, and the facet joints guide each movement. Most low back pain is mechanical. It comes from these everyday structures being strained, not from any one thing being broken. That is why a single cause often can't be pinpointed, and why, most of the time, it doesn't need to be. It also means scans can mislead. Worn and bulging discs show up on the images of plenty of people who feel no pain at all. The reassuring part: most flare-ups ease within a few weeks, and staying gently active usually helps more than resting in bed. Go to the emergency room now if back pain comes with loss of bladder or bowel control, numbness in the groin or saddle area, or new weakness in both legs. This can be cauda equina syndrome, and waiting can cause permanent damage. And see a doctor promptly for back pain with fever, unexplained weight loss, or pain that steadily wakes you at night. This video is for general education only. It is not medical advice. Ask your doctor what's right for you.