What stage in kidney disease has itching, and what causes the body to itch?

Itching is most common in advanced chronic kidney disease, especially stage 4 and stage
5 (also called end stage renal disease), when kidney function is severely reduced.

It happens because waste products and toxins build up in the blood, along with imbalances
in minerals like calcium and phosphorus, which irritate nerve endings in the skin.

Full story:

https://www.quora.com/What-stage-in-kidney-disease-has-itching-and-what-causes-the-
body-to-itch

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