I had sudden onset of lumbar pain (L3-4-5) in early Jan. radiating into my hips, groin, and down the front of my right leg. Went for an epidural steroid injections, which brought pain level from a 10 down to a 3-4. ESI is wearing off and pain level is increasing. Went to Mayo in April for a more specific diagosis and was told by a Physiatrist that what I really need is an injection into my facet joints. I made an appointment with a pain specialist, who said he would do 2 diagnostic medial branch nerve blocks, and if successful, he would move on to radio frequency ablation. I flunked the first diagnostic test, only got about 50% relief. My husband thinks a step was skipped (facet joint injection) and that the wrong area is being focused on. Is there a difference between a facet joint injection and a medial branch nerve block? Or are they different terms for the same thing. I feel like a leaf dangling in the breeze with chronic pain that severely impedes my mobility, can't be on my feet for more than 2-3 hours per day and am on narcotic painkillers. Is anyone more familiar with the above-described procedures, and do they differ?