Medically reviewed by Matthew Wosnitzer, MD Key Takeaways Foamy urine can happen from harmless reasons like dehydration or a fast urine stream.  Proteinuria, which is too much protein in urine, might ...

Proteinuria refers to elevated protein levels in the urine. It is not a disease but a sign that the kidneys are not correctly filtering blood, possibly due to a kidney condition. Several proteins may ...