Nobody knows for certain why some women develope breast cancer and others do not. You should not feel guilty. Breast Cancer is NOT caused by stress or by an injury to the breast. Most women who develope breast cancer DO NOT have any known risk factors or a history of the disease in their families. Getting older DOES increase your risk of getting breast cancer, starting at age 40 and continuing into your 80's.
Breast cancer is the most common cancer diagnosed in women today.
It even occurs in a small number of men. In California alone, close to 20,000 women are diagnosed with breast cancer each year. In the United States, close to 200,000 women are diagnosed with breast cancer each year. You have more choices for treatment when breast cancer is found early. Also, treatments have changed.