Initially HRT made my breasts painful and a bit swollen. Then one became irritated and luckily the timing coincided with a routine mammogram which came back ok. I have dense lumpy breasts as it is and they are definitely more lumpy (apparently it is swollen milk ducts).
It hasn't really settled down. Would it put you off taking HRT? I'm pondering coming off it and I'm not sure I can tell whether the changes are benign or cancerous without constantly going for checks!