I recently noticed a lump under my right nipple which seems to not be going away, about 4 weeks into cycle but I'm not sure if it's gyno exactly or how to treat it. It's not tender, and the nipple is not puffy or sensitive, but there's definitely a lump there. Currently about to start my 7th week on cycle (Test-E, 500mg/week). I wanted to see what i should do as i am already taking arimidex so i am not sure what it could be??