Central sensitisation: Why your nervous system keeps chronic pain "ON".
If you have lived with persistent pain, you have likely been told that your tissues have healed or that diagnostic scans show "nothing wrong." Yet, the pain remains intense and very real. In clinical practice, when pain outlasts normal tissue healing timelines, the driver is rarely ongoing structural damage. It is an over-sensitised central nervous system. Understanding how your brain and spinal cord process pain signals shifts the clinical focus from simply chasing local symptoms to actively retraining your nervous system's threat threshold.
The autonomic balance: Gas pedal vs brake pedal.
Your autonomic nervous system (ANS) operates as your body's automatic control centre, constantly balancing two primary divisions:
Sympathetic dominance - "gas pedal": Mobilises your body for action or defence. Heart rate rises, breathing shallowly accelerates, muscle tone increases, and sensory pathways heighten pain perception.
Parasympathetic tone - "brake pedal": Governed primarily by the vagus nerve, this mode lowers systemic inflammation, reduces muscle guarding, slows heart rate, and initiates tissue repair.
When you experience acute injury or prolonged emotional stress, your system naturally steps on the gas. However, if the nervous system remains in high-alert mode without returning to baseline, it can get stuck in sympathetic dominance.
Central sensitisation: When the volume knob is stuck on high.
When sympathetic arousal stays elevated, the spinal cord and brain undergo structural and functional changes', a state known as central sensitisation:
Lowered pain thresholds (allodynia): Receptors along the spinal cord become hyper-reactive. Non-painful sensory inputs (such as light touch, movement, or gentle pressure) are misidentified by the brain as dangerous threats.
Amplified signal volume (hyperalgesia): Minor tissue irritation triggers an exaggerated pain response because the central "volume knob" is turned up high.
Persistent neural alarm loops: Long after an original injury has healed, the brain continues to output pain signals because the underlying neural circuit remains activated.
Down-regulating pain.
Calming a hyper-vigilant nervous system requires communicating physical safety directly to the brainstem and spinal cord.
I utilise gentle neurostructural chiropractic care, applied kinesiology, and somatic regulation tools to help increase vagal tone:
Reducing nociceptive input: Restoring normal joint mechanics reduces mechanical irritation to exiting spinal nerves, turning down raw threat signalling.
Easing reflex muscle guarding: Releasing chronic paraspinal muscle tension allows hyper-reactive motor pathways to relax natively.
Restoring autonomic flexibility: Helping your nervous system shift out of chronic survival mode and back into a state of healing and repair.
Feeling like your body is stuck on high alert? Book a functional consultation, to evaluate your nervous system and start turning down the volume on chronic pain.