Thank you for the opportunity to help you with your question!
Majority of back pain cases are due to the weight of the upper body, which always puts loads on the lower back.
Supporting all that upper body weight is the spine
which is made up of more than 30 small bones called vertebrae stacked
one on top of the other. A spongy piece of cartilage, called a disc,
sits between each vertebra. It acts as a shock absorber, preventing the
bony vertebrae from grinding against one another.
When the tear this can cause alot of pain again due to movements a vertebra and fracture this again causes pain.
There are cases where the spine can narrow which then puts pressure on the nerves this still can cause back pain.
In other cases low back pain can be a sign of a serious medical condition, such as diabetes.
Please let me know if you need any clarification. I'm always happy to answer your questions.