It’s smart to pay attention to early signs of kidney trouble — but keep in mind that none of these symptoms alone can diagnose kidney disease, and many can be caused by minor or unrelated issues. Still, persistent or multiple symptoms should prompt a medical evaluation.

Here are 17 commonly recognized warning signs of possible kidney problems:

🚨 17 Signs of Potential Kidney Trouble

1. Swelling in legs, feet, ankles, or hands

Kidneys help remove excess fluid — swelling can occur when they don’t.

2. Puffiness around the eyes

Early morning eye puffiness can sometimes indicate fluid imbalance.

3. Changes in urination frequency

Urinating more or less than usual, without an obvious reason.

4. Foamy or bubbly urine

Could indicate protein in the urine.

5. Blood in the urine

Pink, red, or brown urine is a red flag that needs medical attention.

6. Pain or burning when urinating

May signal infection or kidney involvement.

7. Lower back or flank pain

Pain on one or both sides can be related to kidney infection or stones.

8. Persistent fatigue

Kidneys help make red blood cells; trouble can lead to low energy.

9. Shortness of breath

Because of fluid buildup or anemia related to kidney issues.

10. Persistent nausea

Toxin buildup in the body can cause stomach upset.

11. Vomiting

Especially if it comes with other symptoms like fatigue or swelling.

12. Metallic taste in the mouth

Or food suddenly tasting “off.”

13. Loss of appetite

Common when kidney function declines.

14. Dry, itchy skin

Imbalance in minerals or buildup of waste products.

15. Trouble concentrating or confusion

Often linked to toxin buildup or anemia.

16. High blood pressure

Kidneys regulate blood pressure — problems can push it higher.

17. Muscle cramps (especially at night)

Often related to electrolyte imbalances.

⚠️ When to seek urgent care

Get immediate medical attention if you experience:

Severe flank/back pain
Blood in the urine
Fever + painful urination (possible infection)
Swelling with sudden weight gain

✔️ Helpful reminder

These signs can be caused by many non-kidney issues, but persistent symptoms should always be checked by a healthcare professional. Only lab tests (blood, urine, imaging) can diagnose kidney problems.

If you’d like, I can also help with:
✅ Early lifestyle habits that support kidney health
✅ A simple checklist to help decide when to see a doctor
✅ Differences between kidney infection, stones, and chronic kidney disease

Just tell me!

17 signs of kidney trouble you can see—don’t ignore