I went to the doctor recently with a painful lump in my breast. I was kindof scared, but knew most cancerous lumps aren't painful. The doctor told me it was due to caffine. I usually drink coffee a couple times a day, chocolate (which has caffine in it), and soda. Apparently, this can have consequences on your breasts. I try to only limit my coffee to once per day and that has helped significantly. If I have more than one though, I notice the tenderness in my breasts. What he didn't explain to me is can this cause or make you more suseptable to cancer? What is it in caffine that causes this? Has anyone else had this problem??