Most people know the basics of looking after their teeth. Brush twice a day, floss, cut back on sugar and see a dentist regularly. Yet even people who follow those rules carefully can end up with chipped teeth, worn enamel, sensitivity or gum problems. Often, the culprit isn’t neglect. It’s everyday habits that seem harmless but slowly take a toll.

If you’ve ever winced while sipping a cold drink or biting into ice cream, you might have wondered what causes sensitive teeth? Sometimes the answer lies in routines we barely notice, from how we brush to what we drink between meals. Recognising these habits is the first step towards protecting your smile.

Brushing too hard

It seems logical that brushing harder would clean teeth better, but scrubbing aggressively can actually cause damage. Excessive force, especially with a hard-bristled brush, can wear away tooth enamel and contribute to gum recession.

When gums recede, the softer root surfaces of teeth become exposed. These areas can be more sensitive and more vulnerable to decay.

Use a soft-bristled toothbrush and gentle, circular motions. If your toothbrush bristles become splayed quickly, you may be pressing too hard. Electric toothbrushes with pressure sensors can help.

Constant snacking and sipping

Every time you eat or drink something containing sugar or fermentable carbohydrates, bacteria in your mouth produce acids that attack tooth enamel. Saliva helps neutralise these acids, but it needs time to do its job.

Frequent snacking or sipping sugary drinks throughout the day keeps teeth under almost constant attack. Even drinks that seem healthy, such as fruit juice, sports drinks, flavoured waters and sweetened coffee, can contribute.

Try to limit how often you consume sugary foods and drinks. Water is the best choice between meals.

Acidic foods and drinks

Acidic foods and drinks can erode enamel directly. Soft drinks, energy drinks, wine, citrus fruits, kombucha and vinegar-based foods can all contribute to erosion when consumed frequently.

Enamel erosion can make teeth more sensitive and change their appearance, making them look thinner, more yellow or more translucent at the edges.

You don’t need to avoid acidic foods completely, but moderation helps. Drinking through a straw can reduce contact with teeth, and rinsing with water afterwards can help neutralise acids. Avoid brushing immediately after consuming acidic foods or drinks, as enamel may be temporarily softened. Waiting a little while before brushing is often recommended.

Grinding, clenching and using teeth as tools

Many people grind or clench their teeth without realising it, particularly during sleep or periods of stress. This habit, known as bruxism, can wear down teeth, cause cracks, increase sensitivity and contribute to jaw pain and headaches. Signs may include waking with a sore jaw, headaches, worn teeth or a partner noticing grinding sounds at night. A dentist can assess the problem and may recommend a custom night guard to protect your teeth. Managing stress may also help reduce grinding.

It can be tempting to use teeth to open packets, bottles, plastic tags or packaging. But teeth aren’t designed for these tasks, and doing so can lead to chips, cracks or broken fillings. Chewing ice is another common habit that can damage teeth. Ice is hard and cold, which can stress enamel and existing dental work. Biting fingernails, pens or other objects can also cause wear and damage over time. Keep scissors or bottle openers handy so you’re not tempted to use your teeth.

Skipping floss, smoking and missing check-ups

Brushing cleans the surfaces of teeth, but it can’t reach between them. Plaque and food particles trapped between teeth can contribute to decay and gum disease. Floss, interdental brushes or water flossers can help clean these areas. Your dentist or hygienist can recommend the best option for your teeth and gums.

Smoking and vaping can contribute to gum disease, staining, bad breath and delayed healing. Smoking is also a major risk factor for oral cancer. If you’re thinking about quitting, your GP, pharmacist or Quitline can provide support.

Regular dental check-ups allow problems to be detected early, often before symptoms appear. Small issues such as early decay, enamel erosion or gum inflammation are usually easier and less expensive to treat when caught early. If you notice sensitivity, pain, bleeding gums or changes in your teeth, don’t wait for your next routine appointment.

Small habits add up over time. By brushing gently, limiting sugary and acidic foods, protecting teeth from grinding and avoiding using them as tools, you can help protect your teeth for years to come. A healthy smile isn’t just about what you do at the bathroom sink. It’s about the choices you make throughout the day.