I have pain a lot in my left breast on a scale of 1thur 10.i give it an 8.still hurts evan at rest?

"Mastodynia": Sorting out different causes of breast pain starts with determining if the pain is coming from the breast tissue or the chest wall. Favoring the former includes variation w/menstrual cycle; favoring the latter is relation to activity and post-menopausal state. I recommend that you see your gyne or primary care dr. To help sort thru this. Good luck.