I found a ball in my right breast what can it be?

Likely benign: At your age, the finding of a mass suggests it is a benign condition. Risks like your mom and grandmom having breast cancer may raise the chance of some small cancer, but, at the age of 19, it is most often benign scar tissue lump called fibroadenoma. To be sure, let your doctor exam this. The doc can decide with you if any more testing would be worth doing.