As waste products accumulate, nausea and poor appetite are common. Over time, this may contribute to unintentional weight loss and nutrient deficiencies.
12. Muscle Cramps
Electrolyte imbalances — particularly with calcium, magnesium, and potassium — may cause painful muscle cramps or spasms. This is another sign your kidneys may not be maintaining proper balance.
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13. Difficulty Concentrating
When toxins build up in the blood and anemia reduces oxygen delivery to the brain, concentration and memory may decline. Brain fog or poor focus can be an early sign of kidney issues.