Not unusual, though white is a bit weird. What's the water like
temp
pH
kH
ammonia
nitrate
What's the filter.
How big is it, what's in the tank with it?
If you got a small discus a few days ago, and removed it from the shoal it's always been with and stuck in a tank by itself that possibly is too cold, or has nonideal water, then yeah it will be freaking out and will likely change colour one way or the other.....