Low back pain - acute Medline Plus acute discomfort Low back pain - acute Low back pain - acute acute back pain Low back pain - acute Low back pain - acute https://medlineplus.gov/ency/article/007425.htm Encyclopedia: Low Back Pain - Acute MedLinePlus acute discomfort lower back pain Low back pain - acute Low back pain - acute Low back pain - acute Low back pain - acute Low back pain - acute National Library of Medicine