Breast cancer is not caused by bumping, bruising, or touching the breast nor is breast cancer contagious no one can catch breast cancer from another person.
Factors that increase a woman's chances of getting the disease are usually things you have no control over, like age and family history. Most common types of nodules and fibrocystic changes of the breast do not increase your risk of breast cancer.
About 75 percent of all breast cancers are found in women over the age of 50. The disease is uncommon in women under the age of 30.
The risk of getting breast cancer increases for a woman whose mother, sister, or daughter had the disease particularly if she had the disease before she reached menopause.
About 15 percent of women treated for cancer in one breast are likely to get cancer in the other breast later on.