This (as with all breast issues)  is an unhappy mix of ingredients missing, Stuck Liver Qi and flows thus not flowing.

Images of women with macromastia here

I had a woman see me about sore beasts decades ago – her doctor when she visited at 14 complaining of these was told that they would be better after she had had babies! I figured the man had no clue – it is the beginning of pregnancy when without enough ingredients (iodine especially) they are just so painful!
Easily fixed – paint topical iodine on them.

In her aunt’s case – she had had a reduction twice. Each time they had grown back!

Also see breast pain