Pigmentary alteration occurs in 25-70% of the dialysis population and increases over time. A multitude of uremia-related changes are responsible for the pigmentary alterations.
is due to an increase in melanin production because of an increase in poorly dialyzable beta-melanocyte
Frankly speaking there is no proper treatment for this hyper pigmentation and it has been observed that these dark pigmented patches get improved in those patients who receive kidney transplant
The best would be to discuss this with your treating nephrologist