Abstract
BACKGROUND: Truncal fascial plane blocks have demonstrated potential efficacy in the treatment of chronic and refractory non-surgical pain. However, reports on the use of fascial plane blocks for the treatment of primary dysmenorrhea are scare. CASE PRESENTATION: We reported in three cases that bilateral anterior quadratus lumborum block (AQLB) with 20 ml of 0.375% ropivacaine per side not only provided significant relief from menstrual pain in the month of treatment but also sustained a notable analgesic effect over the subsequent 6 months, manifested as an obvious decrease in Cox Menstrual Symptom Scale score. CONCLUSIONS: AQLB may be an optional alternative for long-term treatment of primary dysmenorrhea.