Editing Proteinuria (section)

==Signs and symptoms==
Proteinuria often causes no symptoms and it may only be discovered incidentally.<ref>{{Cite web |title=Proteinuria Causes, Symptoms, Diagnosis and Treatment |url=https://cura4u.com/conditions/proteinuria |access-date=19 October 2023 |website=Cura4U |language=en-us}}</ref>

Foamy urine is considered a cardinal sign of proteinuria, but only a third of people with foamy urine have proteinuria as the underlying cause.<ref>{{cite journal |last1=Khitan |first1=Zeid J. |last2=Glassock |first2=Richard J. |title=Foamy Urine: Is This a Sign of Kidney Disease? |journal=Clinical Journal of the American Society of Nephrology |date=November 2019 |volume=14 |issue=11 |pages=1664–1666 |doi=10.2215/CJN.06840619 |pmid=31575619 |pmc=6832055 |doi-access=free }}</ref> It may also be caused by [[bilirubin]] in the urine ([[bilirubinuria]]),<ref name=friedlander >{{Cite web |title=Urinalysis |first=Ed|last=Friedlander |website=pathguy.com |date=1 January 2016|url= http://www.pathguy.com/lectures/urine.html|url-status=dead|archive-url=https://web.archive.org/web/20060816080010/http://www.pathguy.com/lectures/urine.htm|archive-date=16 August 2006}}{{self-published inline|date=April 2025}}</ref>{{Better source needed|date=April 2025}} [[retrograde ejaculation]], pneumaturia (air bubbles in the urine) due to a [[fistula]],<ref>{{Cite GPnotebook|1161101335|Pneumaturia}} Retrieved 20 January 2007</ref> or drugs such as [[pyridium]].<ref name=friedlander />{{Better source needed|date=April 2025}}