Importantly, the majority of breast pain is totally normal and not associate with cancer or infection
Some amount of breast tenderness is normal. The discomfort may be caused by
Hormone changes from:
Menopause (unless a woman is taking hormone replacement therapy)
Menstruation and premenstrual syndrome (PMS)
Pregnancy — breast tenderness tends to be more common during the first trimester and in women who become pregnant at a young age
Puberty (both girls and boys)
Breast pain associated with breast feeding
Soon after having a baby, a woman’s breasts may become swollen with milk. This can be very painful.
Breastfeeding itself may also cause breast pain
Medications:
Anadrol
Chlorpromazine
Diuretics
Digitalis preparations
Methyldopa (Aldomet)
Spironolactone (Aldactone).
Relieving breast pain
Use heat or ice on the breast
Wear a well-fitting bra that supports your breasts
Medication such as acetaminophen or ibuprofen
Vitamin E, thiamine, magnesium, and evening primrose oil, and reducing fat, caffeine, or chocolate in ones diet may provide pain relief in some patients.
Talk to your doctor or nurse before starting any medicine or supplement.
Call your health care provider if you have:
Bloody or clear discharge from your nipple
Given birth within the last week and your breasts are swollen or hard
Noticed a new lump with the pain that does not go away after your menstrual period
Persistent, unexplained breast pain
Signs of a breast infection, including local redness, pus, or fever