The Science of Vaginal Air: What Does Queef Mean and How Does It Happen?

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For over 99% of people, vaginal air is entirely harmless. Even so, specific clinical patterns point beyond simple air entrapment, signaling an underlying issue with gynecological health.

The most severe structural cause is a rectovaginal fistula: an abnormal tissue tunnel that forms between the rectum and the vaginal wall. When this barrier fails, colonic gas and liquid stool bypass the anal sphincter entirely, flowing directly into the vaginal canal. These fistulas typically result from fourth-degree obstetric tears during childbirth, prolonged obstructed labor, complications from pelvic surgeries, or severe inflammatory bowel diseases like Crohn’s disease.

Pelvic organ prolapse represents another structural factor. When supportive pelvic ligaments stretch, the bladder (cystocele), rectum (rectocele), or uterus drops downward into the vaginal space. This anatomical descent disrupts the normal collapsed profile of the canal, carving out anatomical recesses where outside air easily settles during physical activity. If vaginal air release is accompanied by a sensation of pelvic heaviness, a visible tissue bulge at the opening, recurring urinary tract infections, or a foul, non-ambient odor, a comprehensive urogynecological evaluation is essential.