Common tooth disease: Sensitive teeth, caries, calculus, gingivitis, periodontitis and bad breath. Bad breath is a common problem which arises due to oral bacterial infection. Sometimes, acid reflux, consumption of odorous (such as garlic or onion) food, consumption of alcohol or tobacco , nasal or throat problems, etc can also lead to bad breathe. Oral hygiene is the only way to keep away from all dental problems.
The image shows anatomy of human tooth decay and tooth loss. Tooth decay is the breakdown of teeth due to acids made by bacteria and is one primary reason of bad breath. Other causes for bad breath are cavities, gum disease, failed dental work, dry mouth (or low salivary flow rate), oral cancer, etc. Bad breath is medically called halitosis and can result from poor or unhygienic dental health habits and bacterial infections of the mouth.