The kidneys play a critical role in overall health: they filter toxins, regulate body fluids, balance electrolytes, and support bone metabolism. When kidney function begins to decline, certain outward signs—especially in the feet—may serve as early warnings.

1. Swelling in the feet (edema)

Excess fluid in the lower limbs can occur when the kidneys fail to properly remove water and salt. Watch for tighter shoes or socks, noticeable puffiness, or skin that temporarily dents when pressed.

2. Numbness, tingling, or twitching

The buildup of toxins like urea may damage peripheral nerves, often starting in the feet. This can cause burning sensations, tingling, or numbness. Reduced sensation increases the risk of unnoticed injuries.

3. Foot pain or aches

Disrupted mineral balance in kidney disease can lead to bone or joint pain. Elevated uric acid levels may also trigger gout attacks, which commonly strike the big toe.

4. Skin color changes

Kidney-related circulation problems may cause the feet to look pale, bluish, reddish, or darker than usual. These shifts can reflect issues such as poor blood flow, venous congestion, or hyperpigmentation.

5. Dry, itchy skin

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