Pseudo gynecomastia is an increase of adipose tissue in the male chest area causing the appearance of female like breasts. This condition is often confused with true gynecomastia which is an increase of glandular breast tissue in males.
Pseudo gynecomastia can be caused by a host of reasons including improper diet, lack of exercise, medications, alcohol and marijuana use as well as other drug use.
You want to control estrogen while ON cycle, that's what an AI does, not Nolvadex(SERM). If during a cycle you begin to have trouble while taking an AI still, then take 20mg ed for a week, not throughout.