Weird spot on nipple

Adrianna • 👰🏻‍♀️ 12/16/17 Baby Boy 🧒🏼 4/1/19 Baby expected 👶🏼 3/2022

Im pregnant with my first baby, and my nipples started leaking a couple months ago. Over the past few weeks I developed a white spot on my nipple that wasnt there before. It looks like a pimple but it is on my nipple. Not my areola. Anyone know what this could be?