Smokeless (Chewing) Tobacco

Different Forms of Smokeless Tobacco
Smokeless tobacco comes in a number of different forms including chewing tobacco, snuff, and snus. They all have 2 things in common - nicotine and cancer. Nicotine is a highly addictive substance found in tobacco. Nicotine is as addictive as heroin, cocaine, or alcohol. Using smokeless tobacco can lead to nicotine dependence. 
Health Risks
The Surgeon General has determined that the use of oral tobacco can lead to oral cancer, gum disease and increased risk of cardiovascular disease, including heart attacks. Constant exposure to tobacco juice causes cancer of the esophagus, pharynx, larynx, stomach and pancreas. 

Oral tobacco causes leukoplakia, a disease of the mouth characterized by white patches and oral lesions on the cheeks, gums, and/or tongue.  Leukoplakia, which can lead to oral cancer, occurs in more than half of all users in the first three years of use. Studies have found that 60 to 78 percent of smokeless tobacco users have oral lesions.
Get Help to Quit
It can be just as hard to quit using smokeless tobacco as it is to quit smoking. Chewers and dippers are much more likely to succeed in quitting if they get help.