Can lip biting cause oral cancer? i have it as a habit.

Possibly yes: If you continue to bite your lip you are not likely to get cancer but it could happen. The repeated trauma can cause inflammation and proliferation of the tissues in the area. Over time things can change and you can progress through some of the stages and eventually get cancer, but that takes a long time. Have it checked regularly and stop biting it.

Usually not: Repeated severe lip biting can cause chronic stress and trauma to the lip . Sometimes these traumatic lesions can have precancerous properties .In other words you may get lip cancer after years of aggressively biting your lip but there's no reason why you should get oral cancer from lip biting.

Probably not: Lip biting by itself does not produce oral cancer though there has been known cases. Any lesion such as one caused by lip biting could become malignant but research on this has shown that generally this does not occur.

Probably not. Would require a lot of irritation over long period of time. Can, however, disfigure lip. Can cause unsightly scar tissue. Time to break the habit.