Mine was a very bad BO smell like I forgot yo put deodorant on then took a five mile walk and the sweat dried. I could not get rid of that smell. It didn’t have it on my right side. Even after scrubbing and using deodorant the smell would not go away. After my mastectomy it was gone.

@veenu
For me, it was like something rotting and just disgusting. I kept asking my husband and daughter if they could smell this but no one could. I do have a sensitive "snifter" and when my kids were young, I would have them breathe on me when they were sick and I could tell that something was not right but the smell of them sick was not like what my cancer smelled like -- completely different smell.

For me, (left armpit only, even while showering, but really strong after sleeping) like fresh cat spray (pee), with an undertone of the smell handling raw onions leaves on my hands. Other warning signs were periodic sharp pains in left breast and rapid weight loss.