why are my nipples sore?
There are a few of reasons why your breasts and nipples might feel tender or sore. It’s totally normal for your breasts to feel sore or tender while they’re growing (the same way you sometimes feel growing paints in other parts of your body). Some women also find that their breasts feel tender the week before their period. Dry skin, injury, or friction can also cause your nipples to feel sore, sensitive, or tender.