A viral trend on TikTok has brought attention to a purported side effect of Brazilian waxing, with some users claiming that hair removal can lead to increased flatulence. Content creator Sarah Baus, who has over one million followers, posted a video explaining her theory that the absence of pubic hair, which normally provides friction for passing gas, can result in louder or more noticeable flatulence. She described the phenomenon as "bikini farts."

Baus's video suggests that without hair, the skin-to-skin contact in the area, especially when combined with moisture, can cause "unexpected noises" during flatulence. "Silent farts are not a thing" when one is smooth after a Brazilian wax, she stated.

Experts in the beauty industry have acknowledged the theory, though they note it's not a common complaint among clients. Courtney Claghorn, founder of the salon SUGARED + BRONZED, commented on the phenomenon, stating, "I can understand the theory that increased skin-to-skin contact, especially when there's moisture involved, could occasionally create some unexpected noises." However, she added that the majority of her clients have not reported experiencing louder flatulence after waxing.

Claghorn offered advice for mitigating potential discomfort, suggesting that keeping the area cool and dry, wearing loose-fitting underwear and breathable clothing, and using a gentle, fragrance-free moisturizer can help. She also recommended waiting at least 24 hours after a Brazilian wax before engaging in intimate activities, or 48 hours for those prone to ingrown hairs.

Since Baus's video gained traction, numerous women have shared their own experiences online, with many agreeing with the premise. Some users have humorously described the sounds and their own embarrassment, while others have shared