Cigarettes are more likely than cigarettes to cause mouth cancer than they are to cause lung cancer. Both items include tobacco. The major distinction is that a cigar is wrapped in a tobacco leaf or a tobacco-containing substance, whereas cigarettes are wrapped in paper or a tobacco-free material. Both cigarette smoking and cigar smoking are behaviors known to be harmful to health. Cigarette smoke contains nicotine, which is toxic to cells in the body, especially those in the lungs. In addition, it contains carbon monoxide, ammonia, and hydrogen cyanide. These substances are all harmful to healthy cells and can lead to death through various mechanisms. The main component of cigar wrappers is tobacco. Like cigarettes, cigars are also packed with nicotine and contain other chemicals that are harmful to health. However, unlike cigarettes, cigars also contain nicotine which allows them to be used as a form of self-administration for people who struggle with addiction. People who use cigars as an alternative to cigarettes may do so because they find cigarettes to be unpleasant or harmful. Or, they may do so because they believe cigars will not get caught by school smoking bans or workplace no-smoking policies. Either way, they're putting themselves at risk of developing problems with their oral health. The most common type of cigar is the cigarillo.