Music and Pain Relief Save

Know-it-now

• Music for pain relief? The effect sizes rival opioids with minimal harm - this is not a placebo effect
• Patient-selected music beats prescribed playlists -  cognitive agency and preference matter more than genre or "relaxing" classification.
• Distraction is not the mechanism - pleasantness, self-efficacy, and rhythmic engagement are the stronger candidates.
• Evidence is still based on pain relief in healthy volunteers. Data in chronic rheumatic pain populations remains sparse

If laughter is the best medicine, then music has to be second best.

A new scoping review in Pain Reports by Bradt et al., examines the effect of music-based interventions (MBIs) on pain management. While its efficacy is well established, how or why music relieves pain has never been fully explained. This systematic review is based on 663 records and 57 studies of MBI effects on experimental or clinical pain.

MBIs show medium-to-large effects on acute pain (SMD 0.65–0.91) and medium effects on chronic pain (SMD = 0.60); comparable to opioids (SMD = 0.60) but without the safety liability. But most still consider MBIs remain dismissed as merely "adjunctive." 

Most studies (74%) used experimental pain models in healthy volunteers; only a minority examined clinical populations or active music-making (4 of 57 studies). Three candidate mechanisms had convergent support:

• Positive emotional valence (pleasantness), not arousal or categorical emotion (happy vs. sad), consistently predicted hypoalgesia.
  • Notably, pleasant nature sounds performed equivalently to music when matched for valence; suggesting music isn't a unique route to positive affect, just an accessible one.
• Cognitive agency (perceived control over music selection) reduced pain intensity in two experimental studies, paralleling clinical evidence that pain-related self-efficacy mediates music therapy's effect on pain intensity and interference in advanced cancer patients.
• Sensorimotor synchronization (tapping/drumming to rhythm) amplified analgesic effects beyond passive listening, implicating motor-affective pathways already known to modulate pain (e.g., motor cortex stimulation for chronic pain).

Neuroimaging data suggest music acts on both early nociceptive processing (spinal cord, brainstem, somatosensory cortex) and higher-order affective appraisal (prefrontal cortex). In fibromyalgia specifically, music partially normalized default mode network connectivity (precuneus, medial prefrontal cortex) — a tentative but intriguing signal given that these areas of the brain are tied to pain-related rumination.

Most studies tested only the treatment→mediator path, not the mediator→pain path or full mediation. Hence "mechanisms" of effect remain associational rather than causally established. Distraction, often assumed to be the operative mechanism, was not supported (eg, unpleasant music and neutral sounds captured attention without reducing pain).

(Editor's note: Music has been used in fibromyalgia, but most of the trials are small and short term.  Results suggest it is a safe, inexpensive, adjunct that can acutely lessen perceived pain and improve mood/well-being in FM, but it should complement other evidence-based multimodal interventions (exercise, CBT, and pharmacotherapy).  Few trials have shown short-term reductions in pain in fibromyalgia with positive neuroimaging outcomes; but the effect on pain is inconsistent and variably durable, thus clinically meaningful benefit remains unproven.)