23 Signs Your Kidneys Might Be in Trouble (What to Watch For)
Your kidneys filter waste and extra fluid from your blood, help control blood pressure, balance minerals, and support healthy red blood cell production. Kidney problems can develop quietly, and early symptoms may be mild or mistaken for other issues.
Having one of these signs does not automatically mean you have kidney disease, but persistent or unusual changes should be discussed with a healthcare professional.
23 possible signs of kidney problems
1. Changes in urination
- Urinating much more or less than usual
- Needing to urinate more often, especially at night
- Difficulty starting urination
2. Foamy urine
- Excess foam may sometimes indicate protein leaking into the urine.
3. Blood in the urine
- Pink, red, or cola-colored urine should be evaluated.
4. Swelling in the feet, ankles, or legs
- Reduced kidney function can cause fluid buildup.
5. Puffiness around the eyes
- Especially noticeable in the morning.
6. Unexplained fatigue
- Kidney problems can contribute to anemia and low energy.
7. Trouble concentrating
- Waste buildup or chemical imbalances may affect mental clarity.
8. Loss of appetite
- Changes in metabolism can reduce hunger.
9. Nausea or vomiting
- More common in more advanced kidney problems.
10. Itchy or dry skin
- Mineral and waste imbalances can contribute to itching.
11. Muscle cramps
- Changes in electrolytes such as calcium or potassium may play a role.
12. Shortness of breath
- Fluid buildup or anemia related to kidney disease can contribute.
13. High blood pressure
- Kidney problems can raise blood pressure, and high blood pressure can also damage kidneys.
14. Lower back or side discomfort
- Some kidney conditions may cause pain, though many kidney problems do not.
15. Bad breath or unusual taste in the mouth
- Waste buildup can sometimes affect taste and breath.
16. Dry mouth or excessive thirst
- May occur with fluid imbalance or conditions affecting kidney function.
17. Unexplained weight changes
- Sudden weight gain from fluid retention or weight loss from illness may occur.
18. Feeling cold more often
- Kidney-related anemia can contribute to feeling unusually cold.
19. Difficulty sleeping
- Itching, discomfort, or restless legs may interfere with sleep.
20. Restless legs or unusual leg sensations
- Some people with kidney disease experience these symptoms.
21. Frequent infections
- Some people with chronic kidney problems may have increased health complications.
22. Reduced ability to exercise
- Fatigue, anemia, or fluid changes may affect stamina.
23. A rise in creatinine on a blood test
- Creatinine is a waste product measured to help assess kidney function. A high level may indicate reduced filtration, but it must be interpreted with other factors such as eGFR, muscle mass, and hydration
