I learned many, many years ago when I started to have breast pain, the doc asked me if I drank a loft of caffeine. I told him I only had one cup of tea in the morning, not thinking about all the soft drinks I drank during the day.
Caffeine causes breast pain!
I'll never forget a birthday cake that my co-workers had made up for me with two "boobies" on it with a big OUCH underneath them. I think my good buddies were tired of hearing me complain about my sore boobies!
Lynne