Low back pain is pain and stiffness in the lower back. It is one of the most common reasons people miss work. Low back pain is usually caused when a ligament or muscle holding a vertebra in its proper position is strained.
Vertebrae are bones that make up the spinal column through which the spinal cord passes.
When these muscles or ligaments become weak, the spine loses its stability, resulting in pain. Because nerves reach all parts of the body from the spinal cord, back problems can lead to pain or weakness in almost any part of the body. Low back pain can occur if your job involves lifting and carrying heavy objects, or if you spend a lot of time sitting or standing in one position or bending over. It can be caused by a fall or by unusually strenuous exercise. It can be brought on by the tension and stress that cause headaches in some people.