What is disc herniation?
Composed of bone and intervertebral discs, the spine plays a major role in supporting and bearing the weight of the body. By giving a cushioning effect, the intervertebral discs allow us to achieve a certain degree of body flexion. As modern people often bow their heads to look down on their mobile phones and bend their spines incorrectly, the intervertebral discs in the neck and waist are often stressed, which make disc herniation an even more common problem nowadays.
Intervertebral discs are in fact surrounded by fibrous tissues. In the centre of the discs is a jelly-like substance called nucleus pulposus, which is tightly wrapped and protected by the annulus. When the tissues have been stressed for a prolonged period, aged or strained, the annulus may tear. Then when the gel is squeezed out, the problem of disc herniation will result. The protruding discs may be pressed to the surrounding nerves, causing sciatica, which often comes with pain, tingling sensation, numbness or weakness.