February 15–21, 2015 is “Through With Chew Week” Smokeless tobacco can cause oral cancer. It can also lead to other oral problems, such as mouth sores, gum recession, tooth decay, bad breath, and permanent discoloration of teeth. For more information call Call 1-800-QUIT-NOW (1-800-784-8669) 24 hours a day, 7 days a week.