WOMEN are being warned against trying a bizarre new trend that suggests using ground-up wasps nests to tighten and rejuvenate their vagina.

Some online retailers have been selling oak galls, which are nests that house wasp eggs before they hatch, and touting them as a natural way of cleaning female genitals.

3 One of the online listings for oak galls - also known as wasp nests - that are being touted as a way of "rejuvenating" the vagina Credit: Twitter/@BBCWthrWatchers

The product is reportedly used by being crushed into a paste and applied topically, with one listing on Etsy, that has now been removed, claiming it can improve a woman's sex life.

They are also being advertised as helping to "heal episiotomy cuts, rejuvenate the uterine wall and clean out the vagina" after child birth, but warn that it can "burn" when applied.

Now, gynaecologist Jen Gunter is warning women not to get sucked in by the new trend after branding it "dangerous" - saying the practice is using "drying agents" to tighten the vagina.

3 Oak galls are nests that house wasp eggs before they hatch and are now being sold online Credit: Getty Images

Writing on her blog, she said: "Drying the vaginal mucosa increases the risk of abrasions during sex (not good) and destroys the protective mucous layer (not good).

"It could also wreak havoc with the good bacteria. This is a dangerous practice with real potential to harm.

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"Here’s a pro-tip, if something burns when you apply it to the vagina it is generally bad for the vagina."

But it's not the first time that the gynaecologist has warned against using herbal remedies for the vagina.

Last year, she spoke out about the womb detox trend - which claimed to help women with endometriosis, ovarian cysts, thrush and fibroids.

Bags of perfumed herbs, known as Herbal Womb Detox Pearls, were being promoted as a health boost and women were being told to insert three of the balls into the vagina for 72 hours.

3 Gynaecologists are warning women not to get sucked in by the new craze after branding it “dangerous” Credit: Getty Images

But Dr Gunter explained: "Leaving a product that is not designed for prolonged vaginal use (and these are not) in the vagina is a risk for toxic shock syndrome. Just don’t do it.”

Sun Online has contacted Etsy for comment.

Previously, we told you about a mum-of-five who boosted her confidence with non-surgical vagina tightening after cruel jibes from her ex-partner.

