Fibrous tissue (breast tissue thats scar-like or ropey) and cysts (fluid-filled sacs) form in your breasts. sprains in these parts of the body might end up causing painful sensations in the breasts. This might occur due to the distribution of nerves in the upper torso. breast pain can be cyclical and related to your menstrual cycle or noncyclical and not related to your cycle. This pain affects 50 to 70 percent of women and has a number of possible causes. During each menstrual cycle, breast tissue sometimes swells because hormonal stimulation causes the breasts milk glands and ducts to enlarge, and in turn, the breasts retain water. The breasts may feel swollen, painful, tender, or lumpy a few days before menstruation. Breast pain and swelling usually ends when menstruation is over. read more 7 things that might cause your breasts to get bigger heres more about when you might experience a swollen breasts and what might be causing it. Young girls may experience swollen breasts when puberty begins, since the first sign of this life change is the development of tender breast buds, according to the american academy of pediatrics. sore breasts are common during menstruation, but breast pain and discomfort can also occur during perimenopause and menopause. sore breasts can be a symptom of many different health conditions. During your reproductive years, sore breasts could be a sign of pregnancy or a signal that your period is about to start. this was a reason why almost 40 of women discontinued breastfeeding. Some of the reasons for nipple pain while breastfeeding are incorrectly placing the baby, infection, and inflammation.