Your back is made up of a series of bones called vertebrae as well as discs, ligaments, muscles, the spinal cord and nerves. Your back keeps you upright, holds up your head, manages your body's signals through the spinal cord and nerves and lets you bend, lift, twist, and carry. There are 24 vertebrae bones. Between each one of the vertebrae are shock absorbers called discs. Ligaments bind bone to bone.
Muscles expand and contract to allow movement.
Damage to the vertebrae, discs, ligaments, muscles, and the spinal cord and nerves can and do cause back pain. You can hurt these parts of your back in a number of ways. If you lift loads that are too heavy are too far from your body require frequent lifting require twisting require you to work too fast have no handles you can injure your back. If your stomach muscles are weak of if you have a fat stomach, this puts stress on your lower back. The first thing you should do is report your back pain to first aid.