Five things you should never do before a dentist appointment
From the over-keen brushing that does more harm than good to the late-night drink that could complicate your cleaning, discover the mistakes that could be sabotaging your dentist appointment.
Most people give little thought to what they do in the hours and days before a dental appointment. But the routine you follow beforehand can have a noticeable impact on the examination itself — how accurate it is, how comfortable it is, and how much your dentist can actually see.
It’s also a visit a lot of Americans approach with nerves. A 2025 study published in the Journal of the American Dental Association found that nearly 73% of US adults report some level of dental fear, with around a quarter describing it as severe. That anxiety often translates into small pre-appointment habits, done in the name of being prepared, or making a good impression, that can quietly make the visit harder than it needed to be.
Dr Murray Pratt, dentist at Forever Dental and Skin, has put together five of the most common pre-appointment mistakes patients make — and why getting them right could make a real difference to your next visit.
1) Don’t over-brush or aggressively floss right before you arrive
Many patients brush and floss their teeth vigorously in the minutes before a dental visit, hoping to arrive with their teeth at their best. Last-minute scrubbing can leave the gums inflamed and irritated, which makes them more likely to bleed during the examination and can make it harder for the dentist to see what’s going on underneath.
It’s better to brush gently the morning of your appointment. If you haven’t flossed in weeks, don’t suddenly start that morning. A soft-bristled brush, two minutes, normal pressure is all that’s needed.
2) Don’t eat strong-smelling food beforehand
Garlic, onions, coffee, tuna and heavily spiced food can all linger on the breath for hours. The small food particles they leave behind, such as sesame seeds, garlic flakes, bits of onion, can also wedge between teeth and make a cleaning take longer than it needs to.
Something light and neutral before an appointment, such as toast, plain yogurt or oatmeal, is a better option, followed by a quick brush if there’s time.
3) Don’t drink heavily the night before
Alcohol thins the blood, which can increase bleeding during routine cleanings. It can also interact with local anesthetic and leave the body dehydrated, drying the mouth and making the gums more sensitive.
As a general rule, avoid alcohol for 24 hours before any procedure involving anesthetic, and go easy on it the night before even a routine appointment.
4) Don’t try to whiten your teeth at the last minute
Last-minute at-home teeth whitening kits and strips are one of the more common mistakes, particularly among patients who are nervous about how their teeth will look. These products contain hydrogen peroxide or carbamide peroxide, and contact with the gums can cause irritation that lasts for several days. Arriving for a cleaning with already inflamed gums and sensitive teeth tends to make the appointment more uncomfortable than it would have been otherwise.
Patients who want their teeth to look their best for an appointment are better off brushing and flossing properly in the week beforehand.
5) Don’t wait until the end of the appointment to raise concerns
The most common pre-appointment mistake isn’t physical, but rather it’s not flagging an issue early enough in the visit for the dentist to address it properly.
Patients sometimes mention a tooth they’ve been worried about for months only at the very end of the appointment, when there isn’t time left to look at it properly. We can do far more for you if you raise it at the start. Writing concerns down beforehand can help.
One important note: if you’re already on painkillers, blood thinners, or any other regular medication, don’t stop taking them before your appointment without checking first. Some dentists recommend ibuprofen before certain procedures, others ask patients to avoid it. The right answer depends on the treatment, so always ask the dentist’s office in advance.
Here’s what you SHOULD do before a dentist appointment
According to dentists, the most useful thing you can do before an appointment is also the simplest: arrive as you normally would, eat lightly, and bring up anything you’re worried about at the start.
