Can toothpaste cause dry mouth at night?

Toothpaste itself is not typically the direct cause of dry mouth, but certain ingredients within it can contribute to the condition. Specifically, sodium lauryl sulfate (SLS), a common foaming agent, can be an irritant for some people and may contribute to a feeling of dryness. While alcohol is a known drying agent more commonly found in mouthwashes, some specialised toothpastes might contain ingredients like baking soda that can also feel drying to some users. To combat dry mouth, consider using a toothpaste specifically designed for dry mouth sufferers. These toothpastes are often formulated with ingredients that help soothe the mouth and may contain fluoride to help prevent cavities.

How can I prevent dry mouth at night?

To prevent dry mouth at night, stay hydrated throughout the day, use a humidifier in your bedroom, and consider using saliva substitutes or products to stimulate saliva production. Try to breathe through your nose as much as possible. Avoid caffeine, alcohol, and tobacco before bedtime, as they can worsen dry mouth.

Dry Mouth At Night: Causes, Effects, and Remedies

Dry Mouth At Night: Causes, Effects, and Remedies

Last updated 10/26

This blog has been reviewed and approved by Dr Robert Lee, a dental professional of 35 years

Table of Contents

Key Takeaways

Dry mouth occurs when not enough saliva is being produced to maintain a moist mouth.
Causes of dry mouth can include breathing through the mouth when sleeping, not hydrating enough during the day, certain medications, and health conditions.
Dry mouth can lead to an increase in plaque buildup since not enough saliva is being produced to wash away leftover food and debris, increasing the risk of tooth decay, gum disease, and bad breath.
Keep your mouth healthy with twice-daily brushing, flossing at least once a day and swishing with an alcohol-free mouthwash.
Avoiding dehydrating substances such as caffeine and alcohol, drinking plenty of water throughout the day, and chewing on sugar-free gum can help alleviate dry mouth.

Man sleeping at night with his mouth open

What Causes Dry Mouth at Night?

Dry mouth occurs when your salivary glands don't produce enough saliva to keep your mouth moist. While daytime dry mouth is often linked to dehydration or medication side effects, nighttime dryness has its own set of causes:

Mouth Breathing During Sleep

Breathing through your mouth instead of your nose during sleep can quickly dry out your mouth.

Especially common among people who snore or have nasal congestion.

Mouth breathing bypasses the natural humidity that nasal breathing provides, which leads to increased dryness.

Medications

Many over-the-counter and prescription medications list dry mouth as a side effect.

- Antihistamines, decongestants, antidepressants, blood pressure medications, and certain pain relievers.

If you take medications at night, their effects may be more pronounced during sleep.

Dehydration

Not drinking enough water throughout the day can lead to dehydration, which reduces saliva production.

- Go to bed dehydrated, you're more likely to wake up with a dry mouth.

Alcohol and Caffeine

Both alcohol and caffeine are diuretics,

- They increase urine production and can lead to dehydration.

Consuming these substances, especially in the evening, can intensify dry mouth symptoms during the night.

Health Conditions

Certain health conditions can affect saliva production.

- Diabetes, stroke, Alzheimer's disease, and autoimmune disorders like Sjögren's syndrome can lead to chronic dry mouth.

Radiation therapy for head and neck cancers can damage salivary glands, reducing saliva output.

Effects of Dry Mouth at Night

While dry mouth may seem like a minor inconvenience, it can have several negative effects on your health:

Disrupted Sleep:

Constantly waking up to drink water can interrupt your sleep cycle, leading to daytime fatigue.

Oral Health Issues:

Saliva plays a crucial role in neutralising acids and washing away food particles and bacteria.

A lack of saliva increases the risk of tooth decay, gum disease, and oral infections.

Difficulty Swallowing and Speaking:

A dry mouth can make it uncomfortable to chew, swallow, or speak, which affects daily activities and quality of life.

Bad Breath:

Reduced saliva flow can lead to a buildup of bacteria in the mouth, causing bad breath (halitosis).

Remedies to Alleviate Dry Mouth at Night

There are several strategies you can implement to reduce or prevent dry mouth during sleep:

Stay Hydrated

Drink plenty of water throughout the day.

Sip water regularly, especially in the evening

- Avoid drinking large amounts right before bed to prevent frequent nighttime urination.

At night keep a glass of water to sip nearby should you wake up with a dry mouth.

Use a Humidifier

Adding moisture to the air with a humidifier can help prevent your mouth from drying out during the night.

This is especially beneficial if you sleep in a dry environment, during winter months, or you have nasal congestion.

Practice Nasal Breathing

If you tend to breathe through your mouth while sleeping, try to retrain yourself to breathe through your nose to avoid dryness.

Using nasal strips or a saline nasal spray before bed can help open nasal passages and encourage nasal breathing.

Adjust Your Sleep Position

Sleeping on your side may help reduce snoring and encourage nasal breathing for some individuals. Experimenting with your sleep position and using pillows to elevate your head can help promote keeping your mouth closed during sleep.

Avoid Dehydrating Substances

Limit your intake of alcohol, caffeine, and tobacco, especially in the hours leading up to bedtime.

- These substances can contribute to dehydration and intensify dry mouth symptoms.

Use Alcohol-Free Mouthwash

Traditional mouthwashes often contain alcohol, which can dry out your mouth.

Use alcohol-free mouthwashes designed for dry mouth relief.

Chew Sugar-Free Gum or Lozenges

Chewing sugar-free gum or sucking on sugar-free lozenges can stimulate saliva production, providing temporary dry mouth relief.

- Look for products that contain xylitol which can also help prevent cavities

Try Saliva Substitutes

Over-the-counter saliva substitutes can provide temporary relief

- Available in sprays, gels, and rinses.

Maintain Good Oral Hygiene

Brush your teeth twice a day with fluoride toothpaste and floss daily to keep your mouth clean.

Regular dental check-ups are essential to monitor and address any oral health issues.

Close-up of tongue being examined by medical professional

When to Consult a Healthcare Professional

If dry mouth persists despite implementing these remedies, it's important to consult a healthcare professional.
Persistent dry mouth can be a sign of an underlying health condition that requires medical attention.
A healthcare provider can help identify the cause and recommend appropriate treatments.

Summary

Dry mouth occurs when your salivary glands don’t produce enough saliva to keep your mouth moist. This can be worse at night when saliva production naturally decreases. But other factors can contribute to a dry mouth that is uncomfortable and could disrupt your sleep and affect you throughout the day. Mouth breathing, medications, dehydration, as well as certain health conditions contribute to nighttime dry mouth. While usually harmless, persistent dry mouth has a number of negative effects such as poor sleep quality, and increased risk of dental issues like tooth decay, gum disease, and bad breath. You can also experience difficulty swallowing and speaking as well as mouth sores and infection. Fortunately, there are a number of remedies to alleviate dry mouth. Staying hydrated, using a humidifier, practicing nasal breathing, and using sugar-free gum or lozenges can help. If your dry mouth persists, consult a healthcare professional for evaluation and treatment recommendations.

Help Maintain a Healthy Smile with Oral-B

Keep your teeth clean and help reduce the risk of oral health issues such as cavities, staining, and bad breath. Plaque forms on teeth as a sticky film. Additionally, plaque contains substances that feed on sugar from food and drinks. As these substances metabolize sugar, they release acids that can erode tooth enamel. This can lead to cavities and other problems. But help is just a toothbrush away.

Here are a few suggestions to help establish a regular, effective routine.

Brush 2X/day with an Oral-B iO Electric Toothbrush: To help reduce plaque buildup and protect your teeth and gums, a thorough yet gentle cleaning is key. An electric toothbrush like the Oral-B iO can help maintain the health of teeth and gums better than a manual toothbrush.
Brush with Fresh Bristles Every 3 Months: Get back to a more complete clean by replacing your toothbrush head every 3 months. A brush head in optimal bristle condition, such as the Oral-B Ultimate Clean brush head, helps remove plaque and has different bristle lengths that reach deep into the spaces between your teeth, where plaque loves to hide.

By maintaining a complete oral care routine that consists of an electric toothbrush, targeted flossing, and fluoride toothpaste, you can help support a clean, strong smile.

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FAQs

Toothpaste itself is not typically the direct cause of dry mouth, but certain ingredients within it can contribute to the condition. Specifically, sodium lauryl sulfate (SLS), a common foaming agent, can be an irritant for some people and may contribute to a feeling of dryness. While alcohol is a known drying agent more commonly found in mouthwashes, some specialised toothpastes might contain ingredients like baking soda that can also feel drying to some users. To combat dry mouth, consider using a toothpaste specifically designed for dry mouth sufferers. These toothpastes are often formulated with ingredients that help soothe the mouth and may contain fluoride to help prevent cavities.
To prevent dry mouth at night, stay hydrated throughout the day, use a humidifier in your bedroom, and consider using saliva substitutes or products to stimulate saliva production. Try to breathe through your nose as much as possible. Avoid caffeine, alcohol, and tobacco before bedtime, as they can worsen dry mouth.

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