Most of us think we know how to look after our teeth — a quick scrub morning and night, a rinse with water, maybe a burst of minty mouthwash.
But according to dental experts, even the most diligent brushers might be making mistakes that undo their good work.
Dr. Praveen Sharma, from the University of Birmingham’s School of Dentistry, says half of UK adults will experience gum disease at some point — and one early warning sign is bleeding gums.
“If your gums are bleeding or swollen, it’s a sign you need to brush better,” he explains.
Alongside regular dentist visits, Dr. Sharma and BBC What’s Up Docs hosts Dr. Xand and Dr. Chris van Tulleken outline four common brushing habits that may be harming, not helping, your oral health.
- Brush Once Properly, Not Twice Poorly
The golden rule of “brushing twice a day” still stands — but how you brush matters more than how often.
“If you can, brush properly twice a day,” says Dr. Sharma. “But it’s better to do it once really well and once quickly for two minutes.”
If you only have time for one thorough clean and floss, make it at night.
He also recommends interdental brushes over traditional floss — they’re easier and gentler on gums.
Every tooth has three surfaces — outer, biting, and inner — and all need attention. Use small circular motions, not hard scrubbing, and focus on the gum line, where gum disease starts.
Dr. Xand adds a modern twist:
“Brush mindfully. Focus on the bristles — not your phone.”
- Brush before Breakfast, Not After
Brushing right after eating might feel logical — but it can actually damage your enamel.
“Ideally, brush before breakfast,” says Dr. Sharma. “You don’t want to brush after something acidic.”
Acidic foods and drinks like juice or coffee soften enamel, and brushing too soon can wear it away.
If you must brush after breakfast, rinse with water first and wait at least 30 minutes before picking up the toothbrush.
- Don’t Rinse After Brushing
If you’re a serial rinser, it’s time to break the habit.
“Spit, but don’t rinse with water,” Dr. Sharma advises.
Rinsing washes away the protective fluoride left behind by toothpaste. Instead, spit out the excess and let that thin fluoride layer continue to protect your teeth.
If you want to rinse, use a fluoride mouthwash — not plain water.
- Expensive Toothpaste Isn’t Better
Whitening, charcoal, “enamel-boosting” — the toothpaste aisle can feel like a marketing minefield. But the truth is simple.
“As long as your toothpaste has fluoride, it doesn’t make much difference,” says Dr. Sharma.
He admits he usually buys whatever’s on offer. Fluoride is the key ingredient that protects enamel and prevents decay.
That said, your dentist might recommend specific formulations if you have sensitive teeth or gums.
The Takeaway
Brushing twice a day is good — but brushing smart is better.
- Prioritize technique over timing.
- Brush before breakfast.
- Spit, don’t rinse.
- And don’t overspend — fluoride is what counts.
Because when it comes to oral health, small changes can make a big difference.
