Lots of things,if you are on your period or you are about to start your period,if you hit it,if your breasts are growing,it could also be an infection and maybe cancer.If your breast hurts have it checked right away!Once,my left breast hurt really bad,it was red and sore.I went to a doctor and she told me I had an infection,she gave me some antibiotics and it was gone in a week,so go have it checked!Good luck! :)
*******Contrablue adds:
The previous contributor is correct, but it should be noted that cancer usually does NOT cause pain until it has reached an advanced stage.
The good news is: breast pain is usually NOT caused by cancer.
The bad news is: women still erroneously wait until their breasts hurt to check for cancer. Then it could be too late to achieve a cure.
Self examination and regular checkups should be the routine for every mature woman, and for all young woman with family history of Breast cancer.
Anyone with breast pain of unknown origin should see their health care practitioner at earliest convenience -- not because of a cancer worry, but because more likely causes, like infection, can cause a world of hurt if they're allowed to fester.
They can hurt for several reasons. Sometimes as they grow during puberty they hurt. Also, they're tender during and right before your period. And evidently they also hurt sometimes when you're pregnant and lactating a lot.
Breast soreness is most commonly due to hormonal changes such as around ovulation or menstruation. Breast soreness can also occur if your breasts are growing, or if you're not wearing the correct bra - e.g. not the correct size or not giving you the right sort of support.
because they are growing
If you mean from just kissing, no. Messing around with the nipple and breast, yes. If your breasts are feeling sore for no apparent reason you should do a home breast exam or maybe even see a doctor.
When your breasts are in the first stages of growing they can be especially sore because of the intense growth.
Yes sore breasts are part of many women's periods.
No. Just because your breasts are sore doesn't mean that you are pregnant. When you get your period, your breasts tend to get sore too. Sore breasts aren't the only sign of pregnancy.
because they are growing.
my breast is sore and i eat a lot of spicy
You will get sore boobs at your early stages of pregnancy.
they do get sore when it is time for the females PMS they get so sore that any touch to them hurts the female
They are growing!
I know that your breasts will become sore and your nipples and the skin around them will change color.
Sore breasts before period is normal. If you miss your period, take a test
If your pregnancy test was negative, you got your period and your breasts are sore it could just mean that they're growing. Breasts can also be sore or tender during your period.