Smokeless tobacco may be smokeless, but it isn’t harmless. These are some of the potential hazards: Tooth abrasion from grit and sand in tobacco can scratch teeth and wear away the enamel The consistent irritation caused by chewing tobacco can result in gum recession and other permanent damage to gum tissue Increased tooth decay can result from sugar that is added to smokeless tobacco Tooth discoloration and bad breath are common with long term use Nicotine blood levels are similar to those found in cigarettes A diminished sense of taste and smell caused by tobacco use can lead to unhealthy eating habits Cancer can be caused by all forms of smokeless tobacco All tobacco users need to see their dentist regularly.