I myself, when I ran Halo/Cyano, used 10mg of Nolva every other day. I did have a small lump under my left nipple, which was confirmed by Ultrasound as gyno. It was NOT visible, but tender. I even ran Letro BEFORE my cycle. The Letro made it a little smaller, but never went away completely. When I started my cycle, like I said, I use 10mg of Nolva. By the 2 end of the 2nd week, the lump was completely gone and now into my PCT, still gone and good as new.
I am wondering still about this tiny lump. It turns out, my father and his brother, ( my uncle), both had the same lump, on the same side when they were a little younger. I think it could have been some sort of genetic thing?
But back on track, if there is not history or problems with gyno,,,there is an old saying, if it don't need to be fixed, don't fix it. But for what its worth, keep it on hand incase. You can never be sorry having things at hand to correct them right away, instead of having to wait.