Central Sensitization

What Is Central Sensitization?

Central sensitization is a condition where the central nervous system (brain and spinal cord) becomes hypersensitive, amplifying pain signals and sometimes creating pain in the absence of tissue damage. It helps explain why chronic pain can persist even after an injury has healed and why pain can spread beyond the original site.¹

How It Develops²

Prolonged pain input changes nervous system
Pain processing neurons become more excitable
"Volume turned up" on pain signals
Brain and spinal cord changes structure
Normal inhibition reduced
Pain becomes self-perpetuating

Signs and Features

Pain disproportionate to tissue damage
Pain spreading beyond injury site
Allodynia (pain from non-painful stimuli)
Hyperalgesia (increased pain response)
Sensitivity to light, sound, smells
Cognitive difficulties ("brain fog")
Fatigue
Sleep problems

Conditions Associated³

Fibromyalgia
Chronic fatigue syndrome
Irritable bowel syndrome
Temporomandibular disorders
Tension headaches
Some chronic low back pain
Chronic whiplash
Complex regional pain syndrome

Why Understanding It Helps

Explains pain without clear "damage"
Pain is still real (nervous system problem)
Different treatment approach needed
Reduces self-blame
Guides treatment choices

Treatment Approaches

Education

Understanding pain neuroscience
Reduces fear and catastrophizing
Shown to improve outcomes

Medications

Central-acting medications
SNRIs, tricyclics
Anticonvulsants

Physical Approaches

Graded exercise
Pacing
Desensitization techniques

Psychological

CBT for chronic pain
Acceptance and commitment therapy
Mindfulness
Stress reduction

What Doesn't Help

More surgeries for "structural" problems
Excessive rest
Avoiding all activity
Searching for tissue-based explanation

References

Woolf CJ. Central sensitization: implications for the diagnosis and treatment of pain. Pain. 2011;152(3 Suppl):S2-15.
Latremoliere A, Woolf CJ. Central sensitization: a generator of pain hypersensitivity by central neural plasticity. J Pain. 2009;10(9):895-926.
Nijs J, Torres-Cueco R, van Wilgen CP, et al. Applying modern pain neuroscience in clinical practice: criteria for the classification of central sensitization pain. Pain Physician. 2014;17(5):447-457.