“…Several treatments proposed to treat dysmenorrhea (including hot water bottles, 5 heat wraps, 6 microwave diathermy, 7 massage, 8 transcutaneous electrical nerve stimulation, 9 and trigger point anesthesia 10 ) might plausibly target referred or primary abdominal muscle dysfunction. Despite this implied role, most prior research in dysmenorrhea has focused on prostaglandin-mediated increases in uterine contractility.…”