A systematic review: non‐pharmacological interventions in treating pain in patients with advanced cancer

It was not possible to draw conclusions about the effects and safety of the non-pharmacological interventions in reducing cancer pain. Some interventions showed promising short-term effects, but there is a need for more rigorous trials. Qualitative studies are required to collect information about patients' perceptions. There are several research gaps: we found no studies about music, spiritual care, hypnosis, active coping training, cold or ultrasonic stimulation.