Halitosis is the medical term used to describe noticeably unpleasant odors that are exhaled during the breathing process. In some cases, bad breath is only prominent while talking.

Most bad breath problems begin in the mouth, and are a result of poor dental hygiene. Persistent bad odor from the mouth is indicative of the presence of bacteria that coat teeth and gums. In order to stop bad breath, one must follow a proper cleaning regimen that includes brushing regularly, flossing, and rinsing with mouthwash.

In healthy people, the most common reason for bad breath is food particles stuck to the tongue. Interestingly, it is not the front of the tongue, but the back, that is the source of such bad odor. The back of the tongue, being rough, has innumerable crevices, which are an ideal place for food particles to hide and bacteria to develop. Bad breath can also be indicative of other severe diseases, such as sinus infections, liver and kidney problems, and periodontal disease.

Transient bad breath or temporary bad breath is caused due to stress, hunger, smoking, and poor oral care. Bad breath can cause severe embarrassment, and create social and psychological barriers.

In addition, bad breath can also be caused by improper care of tooth cavities. Cavities are an ideal hiding place for food particles, which collect bacteria over time. Upon decomposing, these food particles release a sulfur compound that results in an unpleasant odor.

A simple test can determine whether a person has bad breath. To test your breath, stick your tongue out as far as possible, and lick your wrist. Wait five seconds and smell. While at the dentist, a simple test conducted by an 'odor-meter' can accurately measure sulfur gases and the extent of the halitosis problem. Fortunately, with proper understanding and care, halitosis is curable.