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Foamy urine (sign of protein leakage)
Dark, pink, or cola-colored urine (blood in urine)
Frequent urination at night (nocturia)
Difficulty urinating or very little output
These aren’t “normal aging”—they’re red flags.
4. Persistent Itching or Dry Skin
When kidneys can’t remove waste and excess phosphorus, toxins build up in the blood, causing severe, unrelenting itchiness—often on the back, arms, or legs.
5. Metallic Taste in Mouth or Ammonia Breath
Known as “uremic fetor,” this occurs when waste accumulates in the blood (uremia). Food may taste off, and you might lose appetite or feel nauseous.
6. Shortness of Breath
