Can a Dentist Tell if you Smoke or Vape Weed? Prime Dentistry 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 a Dentist Tell If You Smoke? Yes, and Here's How 3 Common Oral Health Issues from Vaping Can Dentists Tell if You Vape? Can Dentists Tell You Vape? Dental Signs Revealed