This is called leukoplakia. This area has an increased chance of becoming cancerous. People who dip snuff, versus chewing tobacco, are more likely to have leukoplakia because snuff is held in one spot and chewing tobacco is generally moved around in the mouth. Snuff also contains a much higher amount of carcinogens than loose leaf, plug or twist tobacco. About seven percent of the cases of leukoplakia are cancerous.
Smokeless tobacco is also related to an increased risk of cancer of the tongue and throat.
As with all cancers, oral cancer does have serious consequences. If you notice any of these symptoms, see your doctor. Early detection and treatment are essential to cancer survival. As a result of a reduced sense of taste, many smokeless tobacco users add additional salt and sugar to foods. Both of these practices are unhealthy.