Sherry is right. There aren't necessarily any symptoms, but the only sign of breast cancer is a lump in the breast, to Sherry's description. I felt a lump and had it checked after it had been there for a while and I was concerned. It turned out to be a small tumor and they said I had to get it checked once a year via ultrasound. I was told that if it got any bigger it could become cancerous and I'd have to have it removed. Luckily for me it went away on it's own, but unfortunately other people aren't as lucky. If you have any concerns I'd get it checked immediately. I know I am at risk of getting breast cancer as my grandmother had it, so I will still get it checked when I feel I need to.