Feeling worn out even after a decent night's sleep is one of the more common experiences for people with kidney disease. Part of the reason is anemia, which can develop when the kidneys aren't functioning well.
Since red blood cells carry oxygen throughout the body, a drop in healthy red blood cell count means your body is working harder on less. Treating the anemia often helps with the fatigue, though poor sleep can compound things, too.
If you've been exhausted for weeks with no obvious explanation, that's worth a conversation with your doctor.

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