I am 34 yo, I have a lump in my left armpit that has been there for a few weeks now, it recently became tender to the touch and now just moving my arm is slightly painful.
i've had these before the 1st time when I was pregnant 7yrs ago the dr. said it was milk glands or something like that it went away after a while(months), then it came back and another dr. said it was swollen lymph nodes, it came and went over the years, Now it's back and is getting bigger each time it appears, this is the first time it has been this painful.
Could it be cancer? What could cause this?