This is a type of spinal injection used since the 1930s and developed by Dr. Portner’s mentor, Dr. James Cyriax, in the treatment of certain types of acute and severe low back pain. The term “caudal” means “tail or posterior.” This type of shot has similarities with the injection used during labor and delivery to anesthetize the mother’s saddle area and make the delivery less painful. While the medications are different and no saddle anesthesia is produced, the caudal epidural injection is a reliable way to treat low back pain in many cases. More recently, this injection has been used less often and in its stead, transforaminal epidural injections have become more commonplace. These epidural injections are generally quite safe and effective. Your doctor will discuss the possible benefits and risks of the various injection types.