Although cigars have long been lauded for their smooth and complex flavors, they can also pose a great health risk. All tobacco contains nicotine. We've all heard about the negative health risks of nicotine, but what does it do exactly? Nicotine is a stimulant that produces a sense of euphoria. Even the casual smoker cannot escape the fact that nicotine is highly addictive and contains various toxins, carcinogens, and irritants. Although most connoisseurs of cigars will avoid inhaling the smoke, they are still at risk of developing various types of oral and larynx cancers.