What is causing this pain in my back?

Back pain is a common reason for absence from work and for seeking medical treatment. It can be uncomfortable and debilitating.

It can result from injury, activity and some medical conditions. Back pain can affect people of any age, for different reasons. As people get older, the chance of developing lower back pain increases, due to factors such as previous occupation and degenerative disk disease.

Lower back pain may be linked to the bony lumbar spine, discs between the vertebrae, ligaments around the spine and discs, spinal cord and nerves, lower back muscles, abdominal and pelvic internal organs, and the skin around the lumbar area.

Pain in the upper back may be due to disorders of the aorta, tumors in the chest, and spine inflammation.

Causes

The human back is composed of a complex structure of muscles, ligaments, tendons, disks, and bones, which work together to support the body and enable us to move around.

The segments of the spine are cushioned with cartilage-like pads called disks.

Problems with any of these components can lead to back pain. In some cases of back pain, its cause remains unclear.

Damage can result from strain, medical conditions, and poor posture, among others 

Source: Medical News Today