Smoking
Smoking cigars or cigarettes is a significant cause of bad breath. Besides, it causes a dry mouth, making the breath odor worse than the common odors. Smoking affects the general flow of saliva in the mouth, and it is the primary cause of a dry mouth. Interestingly, cigarettes also contain harmful chemicals that cause bad breath. Moreover, smoking may also cause heart disease and different types of cancers, including oral cancer. Individuals who smoke regularly are also prone to damage to the gum tissue, ultimately causing gum disease.