I had same problem, pituitary prolactinoma. 5 years ago was milky, had biopsy
in right breast - fibroadenoma/benign - some websites say this is an overgrowth of milk producing tissue, which would make sense. It bled a little from the nipple after this and then stopped. No recurrence of any problem until stopped dostinex
to check if prolactinoma had "gone", then it bled again, not profusely. Started Dostinex again.. no probs for 1.5 years. Then took progesterone
only pill for 5 days... it started again. Stopped pill and it has since stopped. Haven't squeezed it very hard to check but normal 'squeezing' produces nothing. Surgeon is talking of removing ducts and all sorts but I think I need more convincing because of the coincidences above...