A TikTok dentist says cavities are contagious – is the viral claim true?

A Houston dentist is confronting TikTok with a brutal truth: you can get cavities from kissing the wrong person. “Thinking about the kiss I gave my husband even though he has cavities,” Dr Tasneem Mahmood writes in her video, captioned: “And that’s on cavities being contagious.” The clip has been viewed more than a million times.