Why are my nipples really sore?

The last week my right nipple has been sore and my last two period has been brown what could be wrong?

okay, so my left nipple and boob really hurts, im 15 and started my period when I was 10, my boobs are quite big awell so I d...

My nipples have been really hard and sore for about 3 days now. Also yesterday I noticed a lil bit of brown discharge in my u...

is it normal if you hardly have any nipples, meaning that it's really flat...???

My nipples starter to hurt its been going on for a week now .this never happen before.now a week later iam spotting and my n...

Okay so my period isn't due until 9 day from now I took a pregnancy test yesterday morning and the morning before that both n...

My nipples are sore..is this a sign of a first period I dont feel any other symptoms just like my regular self..

I have been on birth control for about 6 months and then I got really sick so I couldnt get my medicine so I stopped taking i...

They feel like they are bruised all over, but it is actually not bruised. If I sit down, move a certain way, or squeeze my mu...

For the past few days my chest has been unbearably sore. My breasts feel tender and heavy but I can't touch my nipples at all...