It's the unpleasant smell from the population that makes others feel bored and embarrassed. Don't underestimate the small problem of bad breath, which will make people (especially young people) afraid to communicate with people at close range, thus producing inferiority complex and affecting normal interpersonal and emotional communication, which is very distressing.

Modern medicine believes that the causes of bad breath are:

1. Neglect of oral hygiene: People who don't brush their teeth, rinse their mouths or brush their teeth carelessly, food residues accumulate in their mouths for a long time, and under the action of bacteria, they are fermented and decomposed, producing substances such as indole groups and amines, giving off a rotten stench.

2. Some people who wear dentures do not pay attention to the cleanliness of dentures, and their mouths will smell bad, which is the most common cause of bad breath.

3. Oral diseases: corruption in dental caries, periodontal disease makes the gums often in an inflammatory state, abscess bleeding, festering and purulent, which is easy to produce a rotten stench.

4. Other diseases of the body: Some bad breath is caused by diseases in other parts of the body, such as indigestion, suppurative bronchitis and lung abscess. Will be discharged through the respiratory tract, showing bad breath. In addition, diseases of adjacent organs, such as nasopharynx and nasal cavity diseases, such as suppurative maxillary sinusitis and atrophic rhinitis, can also lead to bad breath.