Yesterday I noticed that my left breast feels sore
and also under armpit which I think is the muscle
and still do now. When I took shower and did breast self-exam, I feel kinda lump but also feel bone (or muscle which I confused). And when you press firmly, it feels hurt. I was so shocked, so I repeated this self-exam many times. Sometimes you can feel it and sometimes you can't. And this morning, I did self-exam again, I barely can't feel it, only feels like bone (or muscle ??