This trial aims to investigate ear acupuncture either with needles or a piezoelectric device as adjunct with standard analgesia care versus standard analgesia care alone. In this trial, there are two acupuncture treatment groups (either tiny ear needles or electrical acupuncture stimulation) and a third comparison group. All groups will receive our usual high standard pain treatment. The group who receive needles will have them in place for 2 hours and on completion of the trial they will be removed. The second acupuncture group will have electrical acupuncture stimulation. Electrical-acupuncture uses a ‘piezoelectric device’, which delivers a very safe electrical discharge near your ear, which sounds like a pen clicking.