Why do epidural steroid injections stop working?

Corticosteroid does one thing well. It suppresses the inflammatory response around a nerve root or inside a joint. While that response is a large share of the pain, the injection looks like a cure. The first one buys ten weeks. The second buys five. The third buys two weeks and a spike in blood sugar. Nothing about the drug changed between those three visits. So something about the pain did, and the shrinking gap is the body telling you what.

Three things can be doing the telling. First, the inflammatory share of the pain is smaller than it was, and the mechanical or neurological share is now what you feel. Second, the structure being injected was never the main source, and the steroid spread far enough to calm a neighbor. Or third, the terrain the injection lands in has moved. Insulin resistance and metabolic inflammation raise the baseline that every local anti-inflammatory has to push against. Poor blood flow in the tiny vessels slows the tissue repair the window was meant to allow. The ASIPP guidelines on epidural interventions recommend repeating only on the basis of documented response to the previous injection, and this is why.

There is a social driver as well, and it is worth naming plainly. A repeat of last time is the easiest thing for a busy system to schedule and the easiest thing for a payer to approve, because the paperwork already exists. A new diagnostic question means a new visit, a new authorization and a physician willing to say the earlier plan is finished. Diminishing returns get treated as a scheduling problem when they are a diagnostic one.

Three readings of the same result

Why the drive over the river makes this worse

A patient coming from Edwardsville or Belleville is about forty minutes from this office with the roads clear. A patient from Highland is closer to an hour. Distance changes behavior on both sides of the desk. The patient does not want to make the trip for a talk. The office does not want to send someone home empty-handed. So the fourth injection gets booked because it fills the visit. The question of why the third one faded gets pushed to a trip that never happens.

We run the opposite policy for long-drive patients. The reassessment visit exists to change the question, not to repeat the answer, and it is scheduled to do more per trip: the examination that was skipped, the bloodwork that was never ordered, and where a diagnostic block is the right next test, the block itself, so that the drive home becomes part of the data. Follow-up on the results can often be done by telehealth where that is clinically appropriate. For most Metro East patients that means fewer bridge crossings, not more.

He ran the repeat too

For a good stretch of his career, Dr. Gurpreet Singh Padda, MD, MBA, MHP scheduled the next injection because the chart said the last one had helped for six weeks. Six weeks looked like success. Then came a run of patients who came back on a shorter and shorter cycle. Their A1C values were rising, and nobody had tied that to the steroid. Only then did he read the cycle itself as the finding. The correction was not a new procedure. It was refusing to repeat one without a stated reason and a stated endpoint.

What is the next step if epidural steroid injections don’t work?

If a controlled medial branch block reproduces the relief twice, radiofrequency ablation of those nerves gives relief measured in many months, not weeks, without steroid. If the pain is radicular (running down a limb) and the epidural window is closing, a spinal cord stimulator can be trialed for a week before anything is implanted. The trial is the decision. If the leg or arm pain has the burning, color-changing signature of complex regional pain syndrome, the next step is a sympathetic block. There, speed matters more than sequence.

None of that is the whole plan. Forty to fifty percent of the protocol here is behavioral and metabolic, with the body-based reason stated every time. Sleep, because one short night turns up pain processing in the cortex (the brain’s outer layer) the next day. Protein and time-restricted eating, because hyperinsulinemia (too much insulin) is the inflammatory engine the injection was fighting. A walking dose, because loaded cartilage and disc are fed by movement and starved by rest. Acceptance and Commitment Therapy is delivered in this building by a licensed, pain-trained behavioral clinician, not handed off. That is because the threat appraisal (how the brain judges danger) that keeps a nervous system on alert is a treatment target, not a personality trait.

What happens at a reassessment visit when injections stop working?

Common questions

Related reading

• Medial branch block
• Radiofrequency ablation
• Failed back surgery syndrome
• Metabolic health and pain
• Sleep, movement and behavior
• Opioid stewardship