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Persistent puffiness around the eyes can sometimes occur when protein leaks into the urine.
The kidneys normally help keep important proteins in the bloodstream. If the kidney filters are damaged, protein may escape into urine and contribute to swelling.
Occasional puffy eyes are much more often caused by sleep, allergies, crying, or salt intake.
## 3. Swollen Ankles or Feet
The kidneys help control sodium and fluid balance.
When kidney function is impaired, extra fluid may accumulate in the tissues and cause swelling around the:
* Ankles
* Feet
* Lower legs
Heart disease, medications, vein problems, and prolonged standing can cause similar swelling.
## 4. Foamy Urine
Urine that appears unusually foamy or frothy may sometimes contain excess protein.
A few bubbles after urinating quickly are normal.
What is more concerning is persistent foam that repeatedly looks like the head on a beer and does not disappear quickly.
A urine test can determine whether protein is present.
## 5. Blood in the Urine
Blood in urine can make it appear:
