(Although these could be more than cysts so if you have a
lump or change definitely talk to your dr, just
in case.) Your
breast tissues also become less dense with age. So at 50 you will have a higher fat to breast tissue ratio than you would at 20. Big changes though would more likely come from weight gain or pregnancy. In my own opinion, unless you started puberty very late (15-17), your breasts are likely done "growing".