Normally, it most often affect at the lower back because the spine is a most important part to support the body. Occasionally, we can seen the following such as an injury from a fall, accident, hard physical labour and advancing age.

The age between 30 and 50 normally have a slipped disc in the lower back and for the cervical vertebra around neck normally occur  between the ages of 40 and 60. But sometimes, person between age 30 and 50 also suffering the cervical vertebra around neck it's depend on the work and what they are doing. Slipped disc can be a symptom free. Symptoms of nerve root pressure also disturbance of feeling in the limbs such as paralysis of single muscles, pain to the arms or legs. It different from the symptoms of pressure on the spinal cord. The symptoms of pressure on the spinal cord may affect with control of the bladder, for example the legs will cause a spasms but not in the arms when the spinal cord in the chest area under the pressure. The other symptoms also will cause of loss control of the bladder function. It is call the symptoms of pressure on the cauda eguina. It will be disturbing of feeling in the rectum and paralysis of both legs.