Caudal epidural are the swiss army knife of lumbar spine injections. They can be useful for treating a number of problems such a back pain coming from the discs and facet joints, as well as inflammation around nerves causing leg pains. They are non-specific, meaning they do not target any specific nerves and thus are rarely used as a diagnostic injection. They are different from the epidural injection commonly used in childbirth in a number of ways. Firstly they are a single injection done at the very bottom of the spine (caudal). Antenatal epidurals are done in the middle of the lumbar spine and are often a continuous infusion with a tiny plastic tube placed around the nerves. Secondly the injection, like all other spinal injections, is a mixture of steroid and local anaesthetic. The local anaesthetic is much weaker than the type used in the antenatal epidural so you should not experience the same numbness and weakness. Finally, with a caudal epidural, the position of the injection is confirmed using an x-ray machine and small amount of dye or contrast. This shows up on x-ray and shows exactly where the injection will flow.