Paddy,
Bro maybe I have been doing this way too long but let me tell you about my lump bro.
Whenever my estrogen gets a little high a tiny pea size mass begins to gain density right under my right nipple. This is how I can tell I'm not on a high enough dose of my AI at that moment. In my case the mass will always begin to get denser well before other estrogen problems show up, like water retention. Right now I have no mass there so the gauge reads Low-E for me.
I guess what I'm saying is that it is nothing to get crazy over. Any hard mass under your nipple should get softer and go away even under a proper gyno protocol and fat loss. Never forget it ti easier to get rid of puffy nipples when you are losing fat.
Surgery is the last option and even then it is not as bad as some guys think.
Most of the men walking around with diagnosed gynecomastia never took steroids, they just got it because they have elevated estrogen and many times high body-fat percentage, just lucky I guess.
Lower estrogen and lose fat. Best ways to get rid of bitch titis.