What Causes Dry Mouth?
Dry mouth, known medically as xerostomia, occurs when your salivary glands do not produce enough saliva to keep your mouth adequately moist. Saliva plays a critical role in oral health — it washes away food particles, neutralizes acids produced by bacteria, and provides disease-fighting substances throughout your mouth. When saliva production drops, your entire oral environment changes, creating conditions that favour tooth decay, gum disease, and infections.
Dry mouth is extremely common, affecting an estimated one in five adults. It becomes even more prevalent with age, not because aging itself causes dry mouth, but because older adults are more likely to take medications that reduce saliva flow. At Redwater Dental Clinic, we see many patients dealing with chronic dry mouth and offer strategies to manage symptoms while protecting their teeth and gums.
Common Causes
Understanding what is causing your dry mouth is the first step toward managing it effectively.
- Medications: Over 500 commonly prescribed and over-the-counter medications list dry mouth as a side effect. These include antihistamines, decongestants, blood pressure medications, antidepressants, pain medications, muscle relaxants, and medications for urinary incontinence and Parkinson's disease.
- Aging: While aging alone does not cause dry mouth, older adults often take multiple medications, are more likely to have health conditions that affect saliva production, and may have changes in how their body processes medications.
- Medical conditions: Diseases such as diabetes, Sjogren's syndrome, HIV/AIDS, Alzheimer's disease, and autoimmune disorders can directly affect saliva production. Nerve damage from injuries or surgery to the head and neck can also impair salivary gland function.
- Radiation therapy: Cancer treatments involving radiation to the head and neck can permanently damage salivary glands, significantly reducing or eliminating saliva production.
- Chemotherapy: Chemotherapy drugs can temporarily change the nature of saliva and the amount produced, though this often improves after treatment ends.
- Tobacco and alcohol use: Both smoking and alcohol consumption can contribute to dry mouth symptoms and worsen existing dryness.
- Mouth breathing: Breathing through your mouth, whether from habit, nasal congestion, or sleep apnea, causes the mouth to dry out, especially during sleep.
Why Dry Mouth Is a Problem
Dry mouth is far more than an inconvenience. Without adequate saliva, your oral health can deteriorate rapidly in several ways:
- Increased cavities: Without saliva to wash away food and neutralize acids, bacteria thrive and produce more acid, leading to rapid tooth decay. Patients with chronic dry mouth often develop cavities along the gumline and on root surfaces where they never had problems before.
- Gum disease: Reduced saliva allows bacteria to accumulate more easily along the gumline, increasing the risk of gingivitis and periodontitis.
- Bad breath (halitosis): Saliva helps cleanse the mouth of bacteria and food particles. Without it, bad breath becomes persistent and difficult to control with brushing alone.
- Oral infections: Dry mouth increases susceptibility to fungal infections like oral thrush (candidiasis) and can cause cracked, sore lips and mouth corners.
- Difficulty eating and speaking: Chewing, swallowing, and speaking all become more difficult without adequate moisture in the mouth.
- Denture problems: For denture wearers, reduced saliva means less cushion between dentures and gum tissue, leading to sore spots and poor fit.
How We Can Help
At Redwater Dental Clinic, our approach to dry mouth combines professional treatments with at-home strategies to protect your teeth and improve your comfort.
- Fluoride treatments: Professional fluoride applications and prescription fluoride toothpaste help strengthen enamel and prevent the rapid decay that accompanies dry mouth.
- More frequent cleanings: We may recommend dental cleanings every three to four months instead of every six months to stay ahead of plaque buildup and catch problems early.
- Saliva substitutes and stimulants: We can recommend artificial saliva products, mouth rinses designed for dry mouth, and in some cases prescribe medications that stimulate saliva production.
- Medication review: We can work with your physician to review medications that may be contributing to dry mouth and explore alternatives where possible.
- Cavity prevention: Custom fluoride trays, remineralizing products, and antimicrobial rinses provide additional layers of protection for patients at high risk of decay.
Tips for Managing Dry Mouth at Home
In addition to professional care, these daily habits can help manage dry mouth symptoms and protect your teeth:
- Sip water frequently throughout the day
- Chew sugar-free gum or suck on sugar-free candy to stimulate saliva flow
- Use a humidifier in your bedroom, especially during Alberta's dry winter months
- Avoid caffeine, alcohol, and tobacco, which all worsen dry mouth
- Breathe through your nose rather than your mouth whenever possible
- Use alcohol-free mouthwash designed for dry mouth
- Brush with fluoride toothpaste at least twice daily
- Limit sugary and acidic foods and drinks
If you are struggling with dry mouth, call 780-942-4691 to schedule an appointment. Our team will develop a personalized plan to keep your mouth comfortable and your teeth protected.
