E cigarettes contain hazardous substances, addictive and harmful Current thinking about the effects of e cigarettes on oral cancer risk BDJ Team Smoking affects more than one organ. It can silently increase the risk of multiple cancers and long term health complications, often before symptoms even begin to appear. Tobacco use is directly linked to Cancer screening adherence among e cigarette users in the United States Lung cancer risks persist with e cigarette use after quitting tobacco smoking