There is central spinal canal
bodies containing multiple nerves.
The Foramen (foraminal) are like small holes though which these nerves comes out to reach to your limbs
When there any extrinsic pressure on nerves there is pain.
The Discs are jelly material in pouch between two vertebrae, with age the water content decreases(called as degenerative changes) and this material comes out of the pouch (called at protrusion) and put pressure on nerve- causing pain.
The end plates interface of vertebrae and disc, with age become rough and irregular( called as degenerative end plate changes) and act as pressure causing points around the spinal canal
There are joints between vertebral bodies to facilitate the smooth movements, with age these joints become rough and irregular( called as facet arthropathy
) and also act as pressure causing points around the spinal canal.
With the features seen the appoint with neurosurgeon is important.