When a disc bulges or herniates it is a major cause of back pain. It can also pinch the delicate nerves that pass by as they come out of the spine. That’s what can cause radiating pain. In other words, pain, tingling and numbness
going down your leg or arm and possibly into your toes or fingers!
This radiating pain is often referred to as sciatica
in the leg, or cervical radiculopathy in the arm.
As the outer portion of the disc weakens, the pressure on the discs causes the inner nucleus to migrate through the small cracks and fissures that have been created. This pressure changes with various activities and an activity such as lifting incorrectly can dramatically increase the pressure inside the disc.
When the pressure in the disc increases, the forces push the inner material outward. And if there are small cracks or tears in the outer fibers of the disc this material can literally “squeeze out.”