Kidney failure doesn’t happen overnight. It often starts with subtle symptoms that are easy to overlook. By the time clear signs appear, the condition may already be serious. Recognizing the early signs of mild kidney dysfunction is key to protecting your health before it's too late. Here are 8 warning signs you should never ignore:

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1. Frequent Urination at Night

If you find yourself waking up several times during the night to urinate, your kidneys might not be concentrating urine properly — an early sign of declining function.

2. Persistent Fatigue or Weakness

Healthy kidneys filter waste from the blood. When they start to fail, toxins build up, leading to constant tiredness, low energy, or difficulty concentrating.

3. Swollen Ankles, Feet, or Hands

Impaired kidney function can cause fluid retention, leading to swelling in the lower body. This sign is often mistaken for general fatigue or standing too long.

4. Foamy or Bubbly Urine

Excessive bubbles in your urine can indicate protein leakage — one of the early signs that your kidneys are not filtering waste properly.

5. Loss of Appetite or Metallic Taste

A buildup of waste in the blood can alter your sense of taste and reduce appetite. You might notice a metallic flavor in your mouth or a constant bad breath.

6. Muscle Cramps or Twitching

Electrolyte imbalances caused by early kidney issues may lead to muscle cramps, spasms, or twitching — especially at night.

7. Dry or Itchy Skin

When kidneys can’t maintain proper mineral and nutrient balance in the blood, it can lead to skin dryness, itching, or even rashes.

8. Puffiness Around the Eyes

This is often an early sign of protein being lost in the urine, indicating kidney damage. If the puffiness persists even after rest, it may be worth getting checked.