Lots of Water and Puffy Nipples/Gyno ?

I seemed to notice something strange. On days that I drink lots of water, I seem to get puffy nipples. However, when I cut back on water, that goes away after a couple days. Has anybody else had this experience? My guess is that body fluid levels are rising, and that just causes something that looks like gyno. However, my bigger question (if this is indeed the case) is, is there a danger that if I keep this up, eventually my chest skin will stretch and there will be some sort of fluid retention or growth into extra space and cause more permanent gyno like physiques?
Thanks,
TS