Halitosis: Causes and Treatment

Diet, oral hygiene, and halitosis are the three pillars of preventive oral health: diet determines the environment in which mouth bacteria live, hygiene controls their proliferation, and bad breath is frequently the first sign that something is wrong in that balance.

More than 85% of halitosis cases originate in the mouth and are completely treatable. However, many people attribute it to digestive or systemic causes and fail to consult a dentist, missing the opportunity to resolve the problem at its real source.

At Asensio Dental Clinic, Dr. Lucía Asensio Romero (Registration No. 46002287) incorporates nutritional and hygiene counseling as an integral part of each patient’s treatment plan. The first visit is completely free of charge.

Diet and Dental Health

Diet influences oral health in two main ways: directly, through the contact of food with teeth and gums, and indirectly, through the supply of nutrients that maintain the integrity of oral tissues. Sugars and fermentable carbohydrates are the substrate that cardiogenic bacteria metabolize, producing acids that demineralize enamel. The frequency of consumption matters as much as the amount: five daily exposures to sugar are more cariogenic than a single exposure with the same total content.

The most beneficial foods for dental health are those rich in calcium and phosphorus —dairy products, almonds, sesame seeds— which remineralize enamel; those rich in Vitamin C —citrus fruits, kiwi, peppers— essential for collagen synthesis in the gums; those rich in fiber —fruits, vegetables, whole grains— which stimulate salivation and act as natural cleansers during chewing; and water, which dilutes acids, washes away food debris, and maintains salivary flow. Raw onion contains sulfur compounds with potent antibacterial properties that reduce the oral bacterial load, even if its short-term impact on breath is the opposite.

Correct Oral Hygiene

Effective oral hygiene requires removing bacterial plaque from all dental surfaces —including interproximal areas and the gum line— at least twice a day, with special emphasis on nighttime brushing. The toothbrush should have soft or medium bristles and be changed every three months. The correct technique consists of short, elliptical movements that simultaneously cover the tooth and the gum, without exerting excessive pressure that causes gingival recession.

Flossing or interproximal brushes are essential: conventional brushing does not reach the contact surfaces between teeth, where approximately 40% of bacterial plaque accumulates and where most interproximal cavities and periodontal disease begin. The best time to use them is at night, when saliva production decreases and the environment becomes more favorable for bacteria. Rinses with chlorhexidine —used in cycles, not continuously— or with essential oils reduce the bacterial load as a complement to mechanical hygiene.

Brushing the tongue, especially the posterior dorsum, removes the volatile sulfur compounds that produce tongue-based bad breath — one of the most common causes of halitosis.

Halitosis: Causes and Treatment

Halitosis or bad breath is a condition that affects 50% of the population at some point in their lives. In 85-90% of cases, its origin is intraoral: the decomposition of organic remains by anaerobic bacteria produces volatile sulfur compounds —hydrogen sulfide, methyl mercaptan— which are responsible for the characteristic odor. The most frequent intraoral causes are plaque accumulation on the tongue, periodontal disease, deep cavities with necrotic tissue, poorly maintained prosthetics or appliances, and dry mouth or xerostomia.

The treatment of halitosis begins with a correct diagnosis of the cause. If the origin is periodontal, periodontal treatment resolves the problem. If it is due to accumulation on the tongue, tongue hygiene instruction and antiseptic rinses are sufficient. If there are active cavities or prosthetics in poor condition, their treatment eliminates the source. Extraoral halitosis —of digestive, respiratory, or systemic origin— is much less common and requires medical evaluation.

This specialty is part of our other dental treatments in Valencia area.

Frequently Asked Questions about Hygiene and Halitosis

How often should you go to the dentist?

For most adults, an annual check-up is sufficient. Patients with active periodontal disease, high risk of cavities, or implant-supported prostheses should visit every 6 months. Children should start check-ups as soon as the first tooth erupts. Regular check-ups allow for the detection and treatment of problems in their initial stages, when treatment is simpler and more conservative.

Is halitosis a hygiene problem?

Not always. Poor hygiene is a frequent cause, but halitosis can appear even with correct hygiene if there is periodontal disease, dry mouth, gastroesophageal reflux, or upper respiratory tract infections. A correct diagnosis of the cause is essential to choose the right treatment.

Do mouthwashes eliminate halitosis?

Mouthwashes with chlorhexidine or essential oils reduce the oral bacterial load and temporarily improve breath, but they do not treat the underlying cause. If halitosis originates from periodontal issues or active cavities, no rinse will resolve it permanently. They are a useful complement to mechanical hygiene, not a substitute for dental treatment.