It would be very helpful to me if someone can answer my queries. I'm 25yrs old, two months back I noticed that one of my breast size has increased and it seems little swollen, little bit pain was also there. I consulted my family doctor and after which pain was not there. Now again sometimes it pains which is bearable. I wanted to ask can these be the reason for cancer and what are the test one has to do to clear the doubts.