Merchants Walk Dental
Oral Health & Medical Conditions4 min read

What Is Dry Mouth?

Published: October 2026Updated: October 2026Written by Merchants Walk Dental Team

What Is Dry Mouth?

Quick Answer

Dry mouth (xerostomia) is a condition in which the salivary glands do not produce enough saliva to keep the mouth moist. It is not a disease itself but a symptom of an underlying cause — most commonly medications, dehydration, or medical conditions.

What You'll Learn

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What dry mouth is
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Why it matters for teeth
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Common causes
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Treatment options
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What Are the Symptoms of Dry Mouth?

Dry mouth can range from mildly uncomfortable to significantly disruptive. It also creates serious dental risks because saliva plays a critical role in protecting teeth and gums.

A sticky, dry feeling in the mouth or throat

The most common symptom — the mouth feels parched even when you have been drinking water.

Difficulty chewing, swallowing, or speaking

Saliva lubricates food and the tissues of the mouth. Without it, these functions become uncomfortable.

A sore or burning sensation in the mouth

Dry tissues become irritated and inflamed, causing a persistent burning or raw feeling.

Cracked lips or dry corners of the mouth

Reduced saliva affects the lips and corners of the mouth, causing dryness and cracking.

Increased cavities or gum problems

The most serious dental consequence — without saliva to neutralize acids and wash away bacteria, decay accelerates.

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How Does Dry Mouth Affect Dental Health?

Saliva is your mouth's natural defense system. It neutralizes acids, washes away food particles, delivers minerals to remineralize enamel, and controls the bacteria that cause cavities and gum disease. Chronic dry mouth removes all of these protections simultaneously, which is why patients with dry mouth often develop cavities rapidly — sometimes in unusual locations like the gumline or root surfaces.

Frequently Asked Questions

Concerned About Dry Mouth?

We can help you manage dry mouth and protect your teeth. Ask us about our prevention options.