There are two ways to remove polish. One is gentle. The other is savage. If you peel the polish off (don’t lie, we all do it), you are literally ripping off a thin layer of your nail. That’s the white spot.
If you use acetone properly, you usually avoid this. But acetone dries out the nail too. So even the “right” way can leave a slight, temporary white haze. It’s a lose-lose for your nail’s ego.
White Spots on Toenails After Nail Polish Removal - NailKnowledge
Think of your toenail like a piece of paper. Polish is the ink. When you rip the ink off, the paper gets fuzzy. That fuzzy white is your nail’s paper texture showing through.
Fun Fact: The “Bubble” Theory
Sometimes, those white spots aren’t from peeling. They are from bad application. If you shake your polish like a maraca, you get air bubbles. Those bubbles get trapped under the polish. When you remove it, the bubbles leave white craters.
So, you are literally a nail artist who created tiny lunar landscapes. Congratulations on your accidental moon art.