"Toothpaste is caustic and too abrasive for a sensitive body part like the vagina and using such on it can destroy the organisms meant to protect the vagina from possible infections," he said.
The doctor says he has seen a "recent obsession" with the DIY practice.
"When the vagina can no longer protect itself, the body is prone to infections which could later destroy the tubes and block the chances of getting pregnant."
Experts all over the world advise women that none of these DIY practices are safe and that the vagina is best left alone.
"I'd urge anyone thinking of trying this rather worrying 'toothpaste' technique to cease and desist - because it won't do anything at all to combat premature ejaculation or erectile dysfunction, despite the claims being made in these videos," British consultant pharmacist James O'Loan said, according to the Sun.
"The peppermint oils and other chemicals in toothpaste, including bleaching agents, can be extremely irritating to sensitive skin. By putting it on your genitals you actually risk a mild burn, as well as blisters and scarring.
"And toothpaste should in no way be used as a lubricant, either."
Similar warnings had to be issued when Gwyneth Paltrow's lifestyle website Goop suggested vaginal steams.