Hello,
Have you had a mammogram? I would suggest that you have one if you haven't already to determine if you perhaps have fibrocystic breasts. Benign cysts appear in the breast and can cause pain.
Hormonal changes around the time of your period can also cause discomfort. Limiting your caffeine and sodium intake may help relieve these symptoms.
Here is some info, please let me know if you have questions:
http://www.drkoop.com/ency/93/003152.html
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