Vaping for just 12 months left woman, 22, with crusty herpes like ulcers so painful she Most of us know that cigarettes are bad for our teeth, but did you know vapes also have a harmful effect on our oral health? Vapes Cause: Dry mouth Gum Disease and Why Do My Gums Bleed Now I've Switched to Vaping? Vaped Vaping may look harmless, but your smile tells a different story From yellow stains and dry mouth to early decay and gum damage vaping silently attacks your teeth and gums