Those patches don't. Match my skin colour and are irregularly spread on my back
It could be vitiligo.
If it is Vitiligo which it sounds like it could be, taking something that reduces oxidative stress could be of use. Studies gave found that Oxidative stress has been indicated in the pathophysiology of vitiligo. I have some ideas of supplements you could try if you're interested.
I would love your advice it would be appreciated if you received mailed me. This spots are slightly white if you ever mail me I might show you the picture
And by the way I am his son