Editing Sciatica (section)

===Spinal disc herniation===
{{main|Spinal disc herniation}}
[[Spinal disc herniation]] pressing on one of the [[lumbar nerve|lumbar]] or [[sacral nerve]] roots is the most frequent cause of sciatica, being present in about 90% of cases.<ref name=Valat2010/> This is particularly true in those under age 50.<ref name=tarulli_radiculopathy>{{cite journal | vauthors = Tarulli AW, Raynor EM | title = Lumbosacral radiculopathy | journal = Neurologic Clinics | volume = 25 | issue = 2 | pages = 387–405 | date = May 2007 | pmid =  17445735 | doi = 10.1016/j.ncl.2007.01.008 | s2cid = 15518713 | url = http://pdfs.semanticscholar.org/27a9/f13596f9bc2fdb873eb83302d14aaa176381.pdf | archive-url = https://web.archive.org/web/20190220113056/http://pdfs.semanticscholar.org/27a9/f13596f9bc2fdb873eb83302d14aaa176381.pdf | url-status = dead | archive-date = 2019-02-20 }}</ref> Disc herniation most often occurs during heavy lifting.<ref name=":3">{{Cite book|url=https://accessmedicine.mhmedical.com/book.aspx?bookID=564|title=Morgan & Mikhail's Clinical Anesthesiology|last=Butterworth IV|first=John F.|date=2013|publisher=McGraw-Hill|others=David C. Mackey, John D. Wasnick|isbn=9780071627030|edition=   5th.|location=New York|pages=Chapter 47. Chronic Pain Management|oclc=829055521}}</ref> Pain typically increases when bending forward or sitting, and reduces when lying down or walking.<ref name=tarulli_radiculopathy/>