What are the methods to test for breast cancer at home ? My wife is slightly worried that she might have breast cancer, I am sure she doesn’t. Anyway please tell us how the lumps are felt, and if there are lumps where would they be placed. What if the lumps are not due to breast cancer ? What are the other reasons you can have lumps ? How often should a woman get a checkup done for breast cancer ? How common is it amongst women ?