Muscle Relaxers Not Helping Pain? The Reason Matters

Published March 7, 2026 · 6 min read

By Tauri Urbanik, Pain Science Researcher

The tension is real. The cause is not what you think.

Your muscles feel tight. They feel knotted. Your doctor or chiropractor can feel the tension. So a muscle relaxer makes sense, right? Relax the muscle, stop the pain.

Except it keeps coming back. The cyclobenzaprine or methocarbamol provides a few hours of relief, mostly because it makes you drowsy. Then the tension returns. The pain returns. And you are right back where you started.

The muscle tension is real. But here is what most doctors miss: the tension is an output, not a cause. If your doctors can't find a clear cause for your pain, that is actually an important clue.

Your brain is creating the tension

When your brain perceives danger, it does predictable things. It increases heart rate. It tenses muscles. It heightens pain sensitivity. This is the fight-or-flight response, and it is completely automatic.

In neuroplastic pain, the brain's danger system is stuck on (Woolf CJ, PAIN, 2011↗). It keeps perceiving threat even when there is no actual danger. So it keeps tensing the muscles. Keeps amplifying pain signals. The muscle tension is not causing the pain. The brain's danger response is causing both the tension and the pain.

Muscle relaxers address the tension. They do not address the brain signal that creates it. The moment the medication wears off, the brain re-creates the tension because its threat assessment has not changed.

Why the relief never lasts

If muscle relaxers help temporarily, ask yourself this: why does the tension always come back?

A true muscle spasm from an acute injury heals. You pull a muscle, it spasms, you rest it, and in a few weeks the spasm resolves. If your muscle tension has been ongoing for months or years, it is not an acute spasm. It is a pattern.

Your brain keeps generating that tension because it keeps perceiving danger. Deadlines, conflict, financial stress, unresolved emotions. These all feed the brain's threat system, which tightens muscles as protection. This is why pain so often gets worse with stress.

The muscle relaxer temporarily overrides the signal. But the brain just sends it again.

The side effects you are paying for nothing

Drowsiness. Dizziness. Dry mouth. Cognitive fog. And with long-term use, dependency risk. Muscle relaxers were designed for short-term acute muscle spasms. Evidence for long-term chronic pain use is limited at best.

If the medication is not providing lasting relief and the side effects are affecting your daily life, you are paying a cost with no return.

Targeting the source, not the symptom

Brain-based approaches address the reason your muscles are tight in the first place. Pain Reprocessing Therapy achieved 66% pain-free rates for chronic back pain by retraining the brain's danger response (Ashar et al., JAMA Psychiatry, 2022↗). When the brain stops perceiving danger, the tension resolves on its own. No medication needed.

Pain neuroscience education, learning how your pain system works, is itself therapeutic (Louw et al., Physiotherapy, 2016↗). Understanding that the tension is a brain output, not a muscle problem, changes how you relate to it. And that change is the beginning of resolution.

Frequently asked questions

Why aren't muscle relaxers helping my chronic pain?

Muscle relaxers assume pain comes from muscle tension or spasm. But in neuroplastic pain, the brain creates the sensation of muscle tension as part of its danger response. The muscle tension is an output of the brain's pain system, not the cause. Relaxing the muscle doesn't address the brain signal generating it.

Are muscle relaxers effective for long-term pain?

Evidence for long-term use of muscle relaxants is limited. They are designed for short-term acute muscle spasms, not chronic pain management. Side effects like drowsiness, dependency risk, and cognitive impairment often outweigh modest benefits when used long-term.

Why does muscle tension keep coming back?

If muscle relaxers provide temporary relief but tension always returns, the tension is being generated centrally by the brain's danger response. Your brain perceives threat and tightens muscles as protection. Until the brain's threat assessment changes, it will keep creating that tension.

What works better than muscle relaxers for chronic pain?

Brain-based approaches target the pain pattern itself rather than the muscle output. Pain Reprocessing Therapy achieved 66% pain-free rates for chronic back pain. These approaches change the brain's threat assessment, which stops generating both the pain and the muscle tension.

References

1. Ashar YK, et al. Effect of Pain Reprocessing Therapy vs Placebo and Usual Care for Patients With Chronic Back Pain. JAMA Psychiatry. 2022;79(1):13-23.DOI: 10.1001/jamapsychiatry.2021.2669
2. Woolf CJ. Central sensitization: implications for the diagnosis and treatment of pain. Pain. 2011;152(3 Suppl):S2-S15.DOI: 10.1016/j.pain.2010.09.030
3. Louw A, et al. The efficacy of pain neuroscience education on musculoskeletal pain: a systematic review. Physiotherapy. 2016;102(1):3-12.DOI: 10.1016/j.physio.2015.10.007