With the arrival of summer, swimming in pools and the sea becomes part of many people’s daily routine. While these activities offer numerous benefits for wellbeing and leisure, it’s important to understand the possible effects that frequent contact with chlorinated or salty water can have on dental health.
Chlorine: What Can Pool Water Do to Your Teeth?
Chlorine is essential for keeping pool water free from bacteria and other microorganisms. However, in high concentrations or with repeated exposure, it can affect the balance of the oral cavity.
People who spend a lot of time in pools—such as swimmers or children during long holidays—may develop what is known as "swimmer’s calculus". This refers to a brownish staining on the teeth caused by changes in the mouth’s pH and mineral deposits from prolonged contact with chlorinated water.
Chlorine can also contribute to dry mouth and may slightly alter tooth enamel, making it more vulnerable to wear—particularly when swimming sessions are long and frequent.
Sea Water: A Risk or a Benefit?
Seawater, on the other hand, has a more alkaline pH and a high concentration of mineral salts. In general, it is not harmful to the teeth and may even offer mild antibacterial effects. However, frequent contact with oral tissues, combined with sun exposure and dehydration, can lead to a drier mouth environment.
Reduced saliva flow is a factor to consider, as saliva plays a key role in protecting against tooth decay and remineralising enamel.
Another important point is to avoid swallowing seawater, as it may contain microorganisms or pollutants.
How to Protect Your Teeth During Summer
A few simple habits can make a difference:
- Rinse your mouth with fresh water after swimming in a pool or the sea;
- Stay well hydrated throughout the day;
- Maintain good oral hygiene, especially after typical beach or poolside snacks and sugary drinks;
- Use a fluoride toothpaste and brush, and don’t forget dental floss;
- Have regular dental check-ups, particularly after summer, to prevent and address any early signs of damage.
Summer is a time for rest, but not for neglect. Looking after your oral health is part of a balanced lifestyle—and essential for a healthy smile all year round.
14, July 2025
