When I was 13 years old my breast started to develop. I noticed by the time I was 16 that my left one was bigger than the right one but still looked like if they were even. Now I am 21 and my left Breast is horribly 1 1/2 bigger than my right. I check my breast for any signs of breast cancer and other signs that could tell me if something is wrong but I am clear and i have no pain either. Please help me. It's very embarrassing. I always check my breast in front of the mirror everyday and it's looks horrible. Even my fiancé has noticed that one of my breast is bigger. Please if you know anything that I can do to even them out or what kind of doctor i should see about this problem, I would really appreciate it. My mother has told me before that it's normal for most women to have a breast bigger than the other, I was comfortable at first with that fact and didn't mind but now it's gone to the point where anyone can tell that one breast is way bigger than the other. please help.