Most Popular Disposable Vape Brands and Their Sites Can a Dentist Tell If You Smoke? Things your dentist can tell by looking in your mouth , If you vape: A dentist may be able to tell if you vape by looking at the condition of your teeth and gums. Vaping can cause dry mouth, which 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 your dentist tell if you vape? The answer is YES! Here's how we know: Dry mouth Leads to more plaque & cavities Inflamed gums Nicotine reduces