Milk, being white, is probably not the problem.
I have newly forming stains on, oddly, the lower half of my 4 top front teeth. It almost seems like they are turning transparent, almost in a straight line across them all. I have good dental hygiene and have had all one cavity in my life.
The only consistent dietary change since this started was a drastic increase in milk consumption. That and meth.
Is it the milk??
Milk, being white, is probably not the problem.
Excess fluoride intake during childhood can cause dental fluorosis. Sometimes the teeth look completely normal until your mouth gets very dry - then the stains become more visible. If the "new" stains are only visible some of the time, this might be the case (in which case the stains were always there, you just didn't notice).
A better question: Is milk racist?
The stains ARE intermittent, but I can’t say for certain that it happens when my mouth is dry. I rarely feel like I have a dry mouth, but I don’t drink a lot of water, just as needed. What’s the connection between dry mouth and tooth stains?
Obviously. Look at the incidence of lactose intolerance in non-white populations versus people with northern European ancestry. The ability to digest milk, and blatantly flaunting it, is a tool of white supremacy.
/yes, I'm being sarcastic but I'd be shocked if someone hasn't already made that argument, and no, I'm not going to go look.
I'm not certain, but I know that the appearance of these stains can fluctuate. You've probably had them since childhood, but never looked closely enough to see them. Most of your friends and family would never even notice.
You might ask a dentist to take a peek just to confirm it's not something else. If the stains are superficial, the top layer of enamel can be etched away professionally, but that means sacrificing that enamel away permanently and hoping that the stains doesn't reside deeper.