<unk>  often doesn't cause any symptoms and it may be discovered incidentally. Foamy urine is considered a cardinal sign of<unk> , but only a third of people with foamy urine have<unk>  as the underlying cause. It may also be caused by bilirubin in the urine (bilirubinuria), retrograde ejaculation, pneumaturia (air bubbles in the urine) due to a fistula, or drugs such as pyridium.
Proteinuria
Crystalluria
Beeturia
Pyuria
Anuria
Bacteriuria
Albuminuria
Polyuria