Dentist explains the 3 times you should never brush your teeth
Sometimes not brushing your teeth is the best way to protect them.

Add this to the list of things you didn't learn in health class.
For those who love the oh-so fresh feeling of immediately running to brush their teeth after a meal, we got some bad news.
London-based dental surgeon and facial aesthetics practitioner Dr. Shaadi Manouchehri recently shocked around 12 million viewers on TikTok after sharing the three occasions when you should “never” be scrubbing those pearly whites—if you want to actually protect your teeth, that is.
The hardest part about this video, which some viewers are undoubtedly still processing, is that each of these no-no times is exactly when brushing your teeth is the only thing you’ll want to do. So much for instincts.
Number one on Manouchehri’s list, which caused the most controversy in the comments, is right after vomiting. Yep, you read that right.
“This is because the contents of the stomach are extremely acidic and the mouth is already in a very acidic state so if you brush straight after [vomiting] you’re basically wearing away your enamel,” Manouchehri explained.
woman in green crew neck shirt holding red lollipopPhoto by National Cancer Institute on UnsplashOf course, commenters weren’t willing to let this one go without a fight. One viewer wrote, “I would rather lose all of my teeth than not brush after vomiting.”
Teeth Getting Up GIF by Paddington BearGiphyManouchehri also says to avoid brushing your teeth directly after eating breakfast. This is because “when you’ve just eaten, the mouth is, again in a “very acidic state,” so if you’re brushing your teeth you’re rubbing that acid on the tooth, which wears down the enamel.” Other sources have also confirmed that brushing your teeth tight after any meal isn’t really recommended.
This goes double for right after sweets.
Manouchehri says to wait a full 60 minutes before putting a toothbrush anywhere near your mouth after having something sugary. Because…you guessed it…acid.
Does this advice seem counterintuitive? Don’t worry, you’re not alone.
@drshaadimanouchehri #dentist #dentistry #dentaladvice #learnontiktok #funfacts #londondentist #dentalcleaning #teethbrushing #teethbrushingmadeeasy #teethbrushingtips #londondentistry #marylebonedentist #fypシ ♬ original sound - Dr Shaadi Manouchehri
“Ah, yes, the three times I want to brush my teeth more than any other time,” one person joked.
Luckily, there are few alternatives to try if you want that good, clean mouth feeling but don’t want to compromise your enamel—the simplest being to either rinse with or drink water. You can also use sugar-free chewing gum or conclude your meal with dairy or non-acidic foods, according to Advanced Dental Associates. If you still crave a little more of a hygiene bang, you can opt for a mouthwash with fluoride and using a tongue cleaner, which removes excess acid, per Curetoday.com.
Guess there’s a time and a place for everything, even when it comes to dental hygiene.
This article originally appeared on 4.16.24
- A 100-year-old neurologist who's still working shares his secrets to longevity ›
- Doctor explains why he checks a dead patient's Facebook before notifying their parents ›
- Doctor finally settles the debate of morning vs. nighttime showers ›
- Dental student blows people's minds about how and why to floss - Upworthy ›
- Should toothbrushes be in the bathroom? Experts weigh in. - Upworthy ›
- Man reads unhinged Haribo sugar-free gummy bear reviews - Upworthy ›
- Impossible-sounding surgery cures blindness by implanting a patient's own tooth in their eye - Upworthy ›
- Dentist applauds 'White Lotus' for having characters with 'perfectly imperfect' teeth - Upworthy ›



A Generation Jones teenager poses in her room.Image via Wikmedia Commons
An office kitchen.via
An angry man eating spaghetti.via 



An Irish woman went to the doctor for a routine eye exam. She left with bright neon green eyes.
It's not easy seeing green.
Did she get superpowers?
Going to the eye doctor can be a hassle and a pain. It's not just the routine issues and inconveniences that come along when making a doctor appointment, but sometimes the various devices being used to check your eyes' health feel invasive and uncomfortable. But at least at the end of the appointment, most of us don't look like we're turning into The Incredible Hulk. That wasn't the case for one Irish woman.
Photographer Margerita B. Wargola was just going in for a routine eye exam at the hospital but ended up leaving with her eyes a shocking, bright neon green.
At the doctor's office, the nurse practitioner was prepping Wargola for a test with a machine that Wargola had experienced before. Before the test started, Wargola presumed the nurse had dropped some saline into her eyes, as they were feeling dry. After she blinked, everything went yellow.
Wargola and the nurse initially panicked. Neither knew what was going on as Wargola suddenly had yellow vision and radioactive-looking green eyes. After the initial shock, both realized the issue: the nurse forgot to ask Wargola to remove her contact lenses before putting contrast drops in her eyes for the exam. Wargola and the nurse quickly removed the lenses from her eyes and washed them thoroughly with saline. Fortunately, Wargola's eyes were unharmed. Unfortunately, her contacts were permanently stained and she didn't bring a spare pair.
- YouTube youtube.com
Since she has poor vision, Wargola was forced to drive herself home after the eye exam wearing the neon-green contact lenses that make her look like a member of the Green Lantern Corps. She couldn't help but laugh at her predicament and recorded a video explaining it all on social media. Since then, her video has sparked a couple Reddit threads and collected a bunch of comments on Instagram:
“But the REAL question is: do you now have X-Ray vision?”
“You can just say you're a superhero.”
“I would make a few stops on the way home just to freak some people out!”
“I would have lived it up! Grab a coffee, do grocery shopping, walk around a shopping center.”
“This one would pair well with that girl who ate something with turmeric with her invisalign on and walked around Paris smiling at people with seemingly BRIGHT YELLOW TEETH.”
“I would save those for fancy special occasions! WOW!”
“Every time I'd stop I'd turn slowly and stare at the person in the car next to me.”
“Keep them. Tell people what to do. They’ll do your bidding.”
In a follow-up Instagram video, Wargola showed her followers that she was safe at home with normal eyes, showing that the damaged contact lenses were so stained that they turned the saline solution in her contacts case into a bright Gatorade yellow. She wasn't mad at the nurse and, in fact, plans on keeping the lenses to wear on St. Patrick's Day or some other special occasion.
While no harm was done and a good laugh was had, it's still best for doctors, nurses, and patients alike to double-check and ask or tell if contact lenses are being worn before each eye test. If not, there might be more than ultra-green eyes to worry about.