Good hypothesis, but i just got puffy nip syndrome after my last cycle. I had never had it before, and my chest has gotten to a pretty good size before this last one.
I'm stumped. I wish i knew what the hell was wrong so i could fix it. Damn it!! Thing is, mine aren't all that bad. Sometimes they're more puffy than others--and yeah, when they're hard, they're not puffy at all. I started taking B6 (thinking maybe it had to do with the tren from before) and they've chilled out a little, but not back to where they were.
If anyone finds the anitdote, please make sure to post.