I have had a sort of long lump in top of my right breast for a very long time, but I can feel something like it in the same place on the left breast as well. I can feel it more pronounced when Im not wearing a bra and I have to really dig into my breast to feel it otherwise. I thought it might just be the breast muscles because I have it in both breasts but Im not so sure because my breasts are really big and I thought I wouldnt be able to feel any muscle because of that. My breasts are all lumpy overall as well but these ones are larger and kind of go around the top and sides of the breasts.