How do Epidural Steroid Injections work to relieve back pain? How it works can be summed up in three ways:
· First, it works due to the local anesthetic injected that immediately numbs the tissues, this effect is often short lived.
· Secondarily, the act of putting fluid in the space acts by diluting, or washing out the inflammatory mediators that cause the nerve to be irritated and inflamed. Due to the nature of the inflammation that has been occurring, there may be some adhesions that take place in the space and by injecting fluid into this space that may break that up and help relieve some tension on the nerves.
· Third, it works due to the natural action of anti-inflammation from the steroid medication. This action does take several days to a week sometimes to manifest itself.
Watch this video
for a brief explanation