What does white on nipple mean?

TMI warning!
Has anyone else experienced a whitish color on their nipples at 17 weeks pregnant? I’m not sure if it’s leaky nipples or they’re just dry? It goes away in less than a day and there is no wetness in my bra. It’s not on both nipples and I use nipple balm. Thanks!

Ita just your body prepping for breastfeeding. Perfectly normal.