I was told the same. I've had a cervical epidural as well as a cervical facet block. For me, it was because I had a bulging disc. However, the epidural did not help at all, the facet block helped for 1 day and because it helped I had a nerve ablation (burning of the nerves although they grow back in a year or so). The ablation did not help that's why I don't believe blocks are always reliable.