Foamy urine can be a sign of dehydration, diabetes, lupus, chronic kidney disease or other conditions. Learn how to diagnose and treat foamy urine and when to see a healthcare provider. Learn about foamy urine causes, from harmless factors to serious kidney conditions. Understand when foam in urine requires medical attention and what tests may be needed. Noticing foamy urine can be concerning, but it’s not always a sign of a serious issue. Occasional foaminess may result from rapid urination or dehydration, but persistent foamy urine can indicate kidney problems or protein leakage (proteinuria). Common Causes of Foamy Urine: Fast Urination – Forceful urination can trap air, causing bubbles. Dehydration –... While the presence of foam in urine can be normal, but it can also indicate potential health problems which affect kidney function. Here's everything you should know about foamy urine causes, and why it is crucial to pay attention. Take a look.