Can biting someone cause cancer?
There is no scientific evidence that one human biting another human can cause cancer.
However, the human bite is a very "dirty" wound because the saliva carries many pathogens. So it is possible to get an infected wound from a human bite.
If bacteria or pathogens enter the bitten person's bloodstream, the person could get a blood-borne illness. For example, AIDS and HIV can be transmitted through contact with blood or intermingling of blood, such as could happen during a bite.