Can Dentists Tell You Vape? Dental Signs Revealed Can your dentist tell if you smoke or vape? , Short answer: not really but there is a subtle tell., Nicotine is a vasoconstrictor, which means it can reduce blood flowso when your gums should be Can Dentists Tell If You Vape? The Bondi Dentists Can your dentist tell if you vape? The answer is YES!, Heres how we know: Dry mouth Leads to more plaque & cavities Inflamed gums Nicotine reduces blood flow, causing redness & swelling Can a Dentist Tell If You Vape? What They Actually See