Discs are shock absorbers, that can bulge, rupture or wear down. Disc injuries can range from minor damage of stretching the anulus to a severe injury resulting in a tear of the anulus. This allows the soft center to push out or rupture, sometimes placing pressure on the nerves in the spinal canal. Spinal Stenosis is a local, segmental or generalized narrowing of the central spinal canal or neuroforamina or the various tunnels through which nerves and other structures communicate with that canal by bony or soft-tissue elements that may encroach on the neural structures. It usually results from osteoarthritis.
Most medical authorities think that it is a variant of rheumatoid arthritis.
These joints involve an overlapping piece of bone from two adjoining vertebrae that glide over each other during movements of the back. Myofascial pain syndrome is caused by injury and damage to the soft tissues. The back pain can manifest itself as a specific ache, twinge, cramp, spasm, vague soreness or severe bout of pain. The symptom can occur immediately or several hours or days after the exertion. Pain is a feeling of distress, suffering or agony caused by stimulation of specialized nerve endings.