Treating insomnia without pills also eases long-term pain

Insomnia is one of the most debilitating companions of chronic pain, and the two feed each other: pain disturbs sleep, and broken sleep makes the days harder to get through. People with back pain, arthritis, fibromyalgia or cancer pain often report both problems at once. The question this review set out to answer is whether treatments aimed squarely at sleep, without medication, can improve not just sleep quality but the pain, fatigue and mood that come with it. If they can, sleep becomes a treatment target in its own right rather than a symptom to endure.

The reviewers searched Cochrane CENTRAL, MEDLINE, Embase and PsychINFO from the start of each database to March 2014 for randomised controlled trials of non-drug interventions that targeted sleep in adults with painful conditions. Trials had to include a control group, a measure of sleep quality and at least one other health or well-being outcome. Eleven trials involving 1,066 participants with mean ages between 45 and 61 met the criteria. Sleep quality, pain, fatigue, depression, anxiety and physical and psychological functioning were extracted at baseline, after treatment and at final follow-up, and the reviewers also checked for signs of publication bias.

Sleep quality showed a large improvement after treatment, a standardised difference of 0.78. Pain fell by a small amount, 0.18, and fatigue improved moderately at 0.38. At follow-up, which ran up to 1 year, the sleep and fatigue gains were maintained, and a moderate reduction in depression of 0.31 also emerged. Both cancer and non-cancer pain patients benefited, face-to-face delivery achieved better outcomes than treatment delivered over the phone or internet, and there was no systematic evidence of publication bias.

This pooled analysis strengthens the case that sleep is not just collateral damage of chronic pain but a treatable problem in itself. The large and durable sleep effect confirms what individual trials had hinted at, while the small pain reduction extends the story: fixing sleep may buy a little pain relief too. The reviewers are careful to note the body of evidence was small, and open questions remain about which specific treatments work best, why face-to-face delivery outperformed remote formats, and whether the pain benefit grows with longer treatment.

For anyone whose long-term pain and poor sleep arrive as a package, this is a reason to think the sleep can be tackled on its own terms, without adding another medication. The pain benefit here was small, so it is best seen as a dividend rather than the main event, but fatigue and mood improved too and the gains lasted. It is also worth knowing that in these trials, sitting in a room with a therapist worked better than phone or internet versions of the same treatments.