Why Sleep Matters in Chronic Pain
Sleep and chronic pain have a complex, bidirectional relationship, meaning each may influence and potentially worsen the other. Research shows that sleep disturbances are highly prevalent among individuals living with chronic pain, affecting up to 75% of patients, and may also contribute to the development of pain conditions over time.
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Key Insights
1. Sleep Disturbance May Increase Pain Risk
Reduced sleep quality, particularly a lack of deep (slow-wave) sleep, has been associated with:
- Increase pain sensitivity
- Reduced natural pain inhibition
- Elevated inflammatory and stress responses
Some studies suggest that sleep disturbance may be a stronger predictor of future chronic pain than pain itself.
2. Chronic Pain May Disrupt Sleep
Individuals with chronic pain may experience:
- Frequent night-time awakenings
- Reduced restorative sleep
- Non-refreshing sleep
This may contribute to a cycle, where pain worsens sleep, and poor sleep further increases pain.
3. Shared Biological Mechanisms
Sleep and pain may be linked through several overlapping physiological pathways, including:
- Neuroinflammation (increased inflammatory markers)
- HPA axis dysregulation (stress response system)
- Central sensitisation (increased pain perception)
- Impaired glymphatic function (reduced brain “waste clearance” during sleep)
These shared mechanisms may help explain why sleep and pain often occur together and reinforce each other.
4. Impact Across the Lifespan
The relationship between sleep and pain may vary across different stages of life:
- Children & Adolescents: Poor sleep may increase future risk of chronic pain
- Adults: Lifestyle, stress, and mental health may influence both sleep and pain
- Older Adults: Sleep and pain may become more interdependent, often forming a persistent cycle
5. Clinical Importance
Improving sleep is considered an important and modifiable factor in chronic pain management. Approaches that may help include:
- Cognitive Behavioural Therapy for Insomnia (CBT-I)
- Sleep hygiene strategies
- Addressing underlying or co-existing health conditions
These have shown benefits in improving sleep and may also help reduce pain.
Conclusion
Sleep plays a critical role in both the development and management of chronic pain. Addressing sleep disturbances early may help:
- Prevent chronic pain
- Improve treatment outcomes
- Enhance overall quality of life
An integrated, comprehensive approach that targets both sleep and pain is essential for effective long-term management.
Reference
Kelleher, E. M., Wall, A., Seymour, B., & Irani, A. (2026). Why sleep matters in chronic pain: Evidence across the lifespan. eBioMedicine, 125, 106158.
Reference: Why sleep matters in chronic pain: evidence across the lifespan – PMC
Disclaimer: This article provides general health information only and is not intended as medical advice. Individual circumstances vary, and readers should consult a qualified health practitioner for personalised assessment and guidance.
