Foamy urine is definitely worth paying attention to, especially with kidney disease. A few small bubbles that disappear quickly are usually nothing to worry about — but persistent foam that lingers in the toilet (even after flushing) can be a sign of proteinuria, which means protein is leaking into your urine.
Normally, the Show Full Answer
Foamy urine is definitely worth paying attention to, especially with kidney disease. A few small bubbles that disappear quickly are usually nothing to worry about — but persistent foam that lingers in the toilet (even after flushing) can be a sign of proteinuria, which means protein is leaking into your urine.
Normally, the kidneys act as filters and keep protein in your blood. When the tiny filtering units (called glomeruli) are damaged, protein can slip through into your urine — and that excess protein traps air, creating foam. If proteinuria is significant, it can sometimes lead to a condition called nephrotic syndrome. Signs to watch for alongside foamy urine include:
- Swelling in your legs, feet, hands, or face
- Decreased appetite
- Stomach pain
- A general feeling of being unwell
The good news is that your healthcare team can check for protein in your urine with a simple urine test. It's a good idea to mention the foamy urine at your next appointment — or sooner if it's persistent or getting worse. Better to flag it early than wonder! 🙂
September 21
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