Does Pubic Hair Removal Raise STI Risk?What Three Studies Found

A headline saying “shaving raises STI risk” can make a grooming choice sound like a diagnosis. Read these findings by population, grooming pattern and infection measure. None of the three studies assigned people to shave to test whether shaving caused an STI.¹²³

The national survey asked about lifetime history

A US survey published in 2017 included 7,580 respondents aged 18 to 65. Participants reported their grooming practices, sexual behavior and whether they had ever had an STI. After adjustment for age and lifetime number of sexual partners, grooming was associated with higher odds of reported STI history: odds ratio 1.8, with a 95% confidence interval of 1.4 to 2.2.¹

An odds ratio compares odds between groups. It does not mean that 80% of groomers will acquire an infection.

The researchers did not measure condom use, and they could not establish whether grooming happened before an infection. Grooming could have begun after an STI. The authors also discuss unmeasured sexual behaviors and reporting errors.¹

Laboratory testing in university women found no association

A 2019 study analyzed 214 women attending STI testing at Ohio State University. Urine tests identified gonorrhea or chlamydia in 21 participants, or 9.8%. Almost everyone had groomed, so researchers compared frequent complete removal with less frequent or no complete removal.²

Frequent complete removal meant weekly or daily over the past year, or at least six times in the past month. Neither measure was significantly associated with either infection.²

This small convenience sample cannot settle the question for older women or for herpes or HPV. Wide confidence intervals leave uncertainty about the size and direction of an association.²

The STI-clinic study depended on the grooming pattern

A study published in 2020 examined 314 adults attending a San Francisco STI clinic. Only 58 participants were women; most participants were men. Diagnoses came from laboratory testing or examination. Its genital category included bacterial vaginosis.³

Recent grooming was not significantly associated with genital STIs overall. However, repeated complete hair removal during the past year was associated with a higher prevalence of genital diagnoses in the combined sample. The corresponding comparison in women did not reach statistical significance.³

Anal grooming was associated with rectal infections in gay and bisexual men. Women were not tested for rectal STIs, so this cannot supply a bikini-line risk estimate for women.³

Like the other studies, this was a snapshot. An association between a grooming pattern and a diagnosis at one visit cannot establish which came first.

Why the numbers cannot answer “Did shaving cause this?”

Reported lifetime infections, current gonorrhea or chlamydia, and multiple clinic diagnoses are different outcomes. They cannot be treated as interchangeable tests of shaving risk.¹²³

Sexual behavior is another difficulty. If people who groom more often also have different sexual exposures, a correlation can remain even when hair removal itself has no effect. Adjusting for age or number of partners helps address selected differences; it cannot account for information that was never collected.

The proposed skin-damage mechanism remains unproven here. None of these studies establishes an STI-prevention waiting period of 24, 48 or 72 hours after shaving.¹²³

Keep grooming decisions and STI prevention on separate tracks

You can choose whether to remove pubic hair based on comfort, appearance and how your skin responds. For technique and irritation questions, see our comparison of pubic hair removal methods.

For STI prevention, CDC⁴ guidance points to condoms used correctly every time, appropriate HPV and hepatitis B vaccination, testing and sharing results with partners. It also describes a mutually monogamous relationship with a tested partner who does not have an STI as a prevention strategy.⁴

Neither a smooth bikini line nor a full covering of hair tells you someone’s infection status. CDC⁴ notes that many STIs have no symptoms, so the absence of a sore or rash cannot replace a test.⁴

At a testing appointment, describe sexual contact and exposure sites as well as any symptoms. A useful question is: “Which infections and which sites should you test based on the sex I’ve had?” Mention a grooming-related cut or irritation too, but do not assume it explains a positive result.

Chapter 6, “Itch, Sweat, and Stubble,” in Down There, Decoded includes “The Shave,” which examines grooming injuries and hair-removal choices. This STI question adds a different check: what an infection study actually measured before its findings become grooming advice.