Halitosis, the medical term for bad breath, is embarrassing for the sufferer. It also causes dry mouth because of hampered saliva production. Dry mouth and halitosis can develop from poor oral health, health problems and medical treatments.

Smoking

Smoking causes gingivitis, an oral disease resulting in bad breath and dry mouth. The American Dental Association (ADA) advises that you talk to your doctor about how to give up smoking.

Health Conditions

According to the ADA, certain health conditions, including bad breath and dry mouth, can result from medical disorders such as postnasal drip, respiratory infections, diabetes, liver and kidney disease and gastrointestinal problems.

Medications

One of the side effects of blood pressure and depression medications is dry mouth--a common cause of halitosis. The National Institute of Dental and Craniofacial Research (NIDCR) says more than 400 medications reduce saliva production.

Cancer Treatments

Radiation and chemotherapy treatments affect saliva production, causing a dry, sticky mouth. The NIDCR says radiation injures salivary glands, and chemotherapy thickens saliva.

Nerve Damage

A neck or head injury may damage nerves that assist in saliva production. When these nerves function improperly, dry mouth and halitosis occur.

Prevention

The best defenses against dry mouth and halitosis are daily brushing and flossing, regular dental appointments and managing health conditions. The ADA suggests chewing sugarless gum to stimulate saliva production.

Source:

American Dental Association: Bad Breath (Halitosis)

More Information:

National Institute of Dental and Craniofacial Research: Dry Mouth