Usually its bc ur prgnant iv never heard ot be bc of somethimg else 🤔

I've seen it can be pregnancy, over active glands, and very verrrrry rarely can be breast cancer but it's very unlikely. Some women even get them around their period. I've always had them on mine. My husband has then too. It's just a thing. I wouldn't worry unless they hurt or leak

I’ve heard pregnancy and hormones so like if u recently got off birth control that can do it too