In most cases your issues are caused by unclean gear, estrogen, prolactin, etc etc. Its a fine balance.
Your playing with an axis of hormones that need to be balanced, when this gets out of whack, the body is out of whack.
Im running 1500mg test E and 150mg eod tren a, less problems than when I was running 750mg week.
If i go from 0-750 I have issues, If I go from 250-500-750-1000 over the course of 10 weeks or more I dont have any issues.
When I go from 1500 down to 500 after contest I like to taper down, and let the body stablize out as I adjust my AI and stuff.
Take your time, go slow there is no rush.