Hi! I discovered soft painless lump in left armpit (closer to the muscle) 10-12 years ago. I went to doctor , she checked my breast and she found nothing and told me that it's a cyst (without biopsy) and nothing to do with it, only if it start to growing or to be painful. Today I read a lot on the internet about this things and it scares me because since that I haven't checked my lump. It's still there, same size (more or less)-it depends of the position of hand, in one position you cannot see it and in another it's clearly visible. I'm breastfeeding so i cannot check my breast properly. Can sameone tell me if has the same problem and what to do?