I often bite my girlfriends breast and leave bruises i m wondering if that could lead to breast cancer?

Breast trauma: I do vaguely remember a paper suggesting higher risk.

Be gentle.: I know of no evidence that breast cancer can be caused by repeated trauma (most evidence points toward hormonal causes) - but it could lead to losing your girlfriend, if she objects to it. Have you talked to her about this? Could you possibly find an alternative to biting that would be more satisfying for both of you and less traumatizing for her?

Unknown: I honestly cannot remember any data that solidly links repeated trauma to the breast and cancer of the breast although it is tempting to theorize there may be some association. Regardless and with all due respect, maybe you should take it a little easier there....... Best regards.

No: But trauma to the breast tissue can lead to damage to the fatty tissue called fat necrosis. This can form lumps to form that can cause a lot of anxiety and concern. If bruises are forming you may want to reconsider the practice.

No. : But i wouldn't blame her for disliking you.

No: While this behavior will not cause breast cancer, it can lead to prolonged discoloration and underlying adipose abnormalities (traumatic panniculitis).