Your brain is trying to protect you — sometimes too well

The brain's ability to rewire itself — neuroplasticity — is one of biology's most impressive features. It's how you learned to walk, ride a bike, play guitar. The nervous system literally moulds itself around your experiences.

But that same plasticity also lets the pain system learn to be more sensitive. When pain is repeatedly triggered, the neural circuits that produce it become more efficient — lower threshold to activate, faster to fire. This is the neuroplasticity of pain, and it's well established in the research.

Imagine your pain system has a volume dial from 0 to 10. In a healthy, non-sensitised system, significant tissue damage might push it to 7 or 8 — enough to make you protect the area and get help.

In a sensitised system, that dial sits at 7 all the time. Normal, harmless movement — tying your shoes, sitting in a chair, turning your head — gets amplified into something that feels like a threat. The stimulus hasn't changed. The system's response to it has.

Lorimer Moseley uses this metaphor in patient education because it's mechanistically accurate. The dial can be turned down. That's the goal of treatment.

Persistent pain also changes how the brain maps the body. Herta Flor and colleagues showed that in people with chronic low back pain, the cortical area representing the back expands and becomes blurred — the brain loses precision in how it represents that region.

This cortical reorganisation correlates with pain intensity: more reorganisation, more pain. And crucially, interventions that help normalise the cortical map — sensory discrimination training, graded movement, pain education — can reduce both the disorganisation and the pain.

The body map in the brain is not fixed. It responds to experience.

I want to be direct about this: an overprotective pain system is not weakness. It's not catastrophising for no reason. It's not failing to push through. It's a biological adaptation that made perfect sense at some point and is now causing more harm than good.

This reframe matters enormously. People who understand that their nervous system is misfiring — rather than believing their body is irreparably broken — consistently do better in recovery. Not because belief alone heals them, but because the fear and vigilance that feed sensitisation begin to reduce.