23 Possible Signs Your Kidneys May Need Attention
Kidney disease can develop without obvious symptoms, particularly in its early stages. So unusual symptoms shouldn’t be used to diagnose kidney problems on their own. Blood and urine tests are often needed to check kidney function.
Some possible signs include:
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Swelling in the ankles, feet, legs, or around the eyes
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Foamy or unusually bubbly urine
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Blood or tea-colored urine
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Urinating more often, especially at night
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Producing much less urine than usual
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Persistent fatigue or weakness
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Difficulty concentrating or unusual mental fog
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Loss of appetite
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Nausea or vomiting
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Persistent itching without an obvious skin cause
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Dry or unusually itchy skin
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Muscle cramps
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Muscle weakness
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Sleep problems
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Shortness of breath, particularly when fluid accumulates
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High blood pressure that’s difficult to control
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Headaches
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Metallic or unusual taste in the mouth
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Bad or ammonia-like breath
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Changes in taste or appetite
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Unexplained weight changes, particularly rapid weight gain from fluid retention
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Flank or back pain, particularly with other urinary symptoms
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Persistent changes in urination, such as pain, urgency, or unusual urine appearance
The important point
Many of these symptoms have much more common causes. For example, leg cramps can result from medications or muscle fatigue, while fatigue can have dozens of causes. Their presence doesn’t establish kidney disease.
If you have risk factors such as diabetes, high blood pressure, cardiovascular disease, a family history of kidney disease, or previous kidney problems, regular kidney testing is especially important.
A clinician can check kidney health with tests such as serum creatinine/eGFR and urine albumin testing.
🚨 Seek urgent care when appropriate
Severe shortness of breath, very little or no urine, severe swelling, confusion, persistent vomiting, or sudden severe flank pain—especially with fever—can require urgent medical assessment.
Bottom line: Don’t wait for 23 symptoms before checking your kidneys. Kidney disease can be silent, so appropriate blood and urine testing is much more reliable than symptom lists.
