National Smile Month

Between 12 May and 12 June 2025, the Oral Health Foundation will raise awareness of important oral health issues.

Join the nation's biggest oral health campaign and help bring a smile to millions of people.

This year the theme for National Smile Month is Feed Your Smile.

Find out more Take part

The role of hydration in oral health

Water is one of the most important factors in maintaining a healthy mouth.

Staying hydrated doesn’t just keep you feeling refreshed - it plays a crucial role in protecting your teeth and gums.

Drinking enough water helps prevent tooth decay, reduces bad breath, and keeps your smile strong.

Why water is essential for oral health

Every sip of water benefits your mouth in several key ways:

Washes away food & bacteria

Water helps rinse away food particles and sugars that would otherwise stick to your teeth and feed harmful bacteria.

Neutralises acids

Drinking water dilutes acids in your mouth, reducing the risk of enamel erosion and cavities.

woman holding glass of water in front of her

Prevents dry mouth

Saliva is your mouth’s natural defence against decay, and staying hydrated helps you produce enough of it. A dry mouth can lead to increased plaque buildup and bad breath.

Strengthens teeth (if fluoridated)

In areas where tap water contains fluoride, drinking it regularly can help remineralise enamel and prevent cavities.

The link between hydration and bad breath

A dry mouth is one of the biggest causes of bad breath (halitosis).

When your mouth lacks saliva, bacteria multiply, producing foul-smelling gases.

Drinking water throughout the day helps keep your breath fresh by washing away these bacteria and keeping your mouth moist.

How to stay hydrated for a healthier smile

Drink water regularly

Aim for at least 6–8 glasses a day to keep your mouth hydrated.

Choose water over sugary or acidic drinks

Water is the best choice for oral health, while fizzy drinks and fruit juices can damage teeth.

Drink water after meals

This helps wash away food particles and acids that could harm your enamel.

Carry a water bottle

If you’re on the go, having water with you makes it easier to stay hydrated.

person lying in bed turning on a dehumidifier

Use a humidifier at night

If you suffer from dry mouth, a humidifier can help maintain moisture levels while you sleep.

The bottom line

Water is the simplest and most effective way to protect your teeth, prevent decay, and keep your breath fresh.

By making hydration a priority, you’ll be taking an easy yet powerful step toward better oral health.

Want to learn more ways to protect your smile? Check out our Best Foods for Teeth guide!

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