These things will help with answering your question because your breasts hurting can be related to all these things.
If you are a teenager then it's normal for your breast's to be hurting. You may experience 'growing pains' which is where your breasts hurt because they are growing. You can all so have breast pain/tender breasts before your period starts and is a symptom of PMS (which stands for Pre-Menstrual Syndrome.) [ Tigz285's advice column | Ask Tigz285 A Question ]
GiddyGeezer answered Sunday August 19 2012, 8:40 am: Drinking a lot of soda with caffiene can cause breast pain. Many women also experience breast pain just before or during their menstrual period. Young girls often have breast pain when their breast are starting to grow, it is a natural thing and nothing to worry about. If however you should feel any lumps or get a discharge from your nipples that would need to be checked out by a doctor. [ GiddyGeezer's advice column | Ask GiddyGeezer A Question ]
flexi01 answered Tuesday August 14 2012, 12:53 am: Oh hun, its nothing really. Dont worry its just growing pains, everyone gets them. Its happened to everyone, trust me its not abnormal for your boobs to hurt once in a while, it just means that they are growing =) Hope this helps! [ flexi01's advice column | Ask flexi01 A Question ]
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