Diskitis is swelling (inflammation) and irritation of the space between the bones of the spine (intervertebral disk space).
Diskitis is an uncommon condition. It is usually seen in children younger than age 10.
Diskitis can be caused by an infection from bacteria or a virus. Or, it can be caused by other inflammation, such as from autoimmune diseases. Autoimmune diseases are conditions in which the immune system mistakenly attacks certain cells in the body.
The upper back (thoracic) and low back (lumbar) disks are most commonly affected.