A Quick Review Foamy urine occurs when proteins like albumin are present in your urine. This can be caused by dehydration or exercise, but it can sometimes be a sign of an underlying kidney ...

Similar to how dark-coloured urine indicates dehydration and a kidney issue, foamy urine, characterised by bubbles in the urine, can also signal trouble. But this is not always the case.

For example, hypoalbuminemia from nephrotic syndrome causes profound fluid-related weight gain, foamy urine, trouble breathing with activity, and high blood pressure. An albumin blood test and a ...