Does foamy urine always mean kidney disease?
No, but persistent foam should be checked.
Diagnostics
Foamy urine: a sign to check
What foamy urine means and when it signals protein in the urine.
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Short Answer
Occasional foam is harmless, but urine that stays foamy — like beaten egg white — can mean protein is leaking from the kidneys, an early sign of kidney damage.
Medical Facts
- Protein changes the surface tension of urine, creating lasting foam.
- A simple urine albumin test confirms whether protein is leaking.
- Persistent proteinuria needs follow-up with a nephrologist.
Treatment or Donation Options
- Request a urine albumin-to-creatinine ratio test.
- Repeat the test if the first is borderline.
- Discuss the result with a nephrologist.
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