What Is Queefing? Causes, Prevention, and More

Queefing is the release of trapped air from the vaginal canal, producing an audible sound that can resemble flatulence but has nothing to do with digestion or the gastrointestinal tract. The medical term is vaginal flatus, and it involves no odor and no waste gases. Reported prevalence figures vary widely depending on the population studied and how the question is asked, with one literature review finding rates anywhere from one to 69 percent of women surveyed.¹ The phenomenon is common, almost always harmless, and more interesting from a biomechanical standpoint than most people realize.

How Air Gets Trapped in the First Place

The vaginal canal is not a sealed tube. It is a flexible, muscular space whose walls normally rest against each other, but it can expand and change shape in response to movement, posture, arousal, and insertion of objects. When the walls separate even briefly, a small pocket of outside air can be drawn inward. The next time the canal narrows again or internal pressure shifts, that air is pushed back out, sometimes with enough speed to vibrate the tissue and create a sound. Think of it like squeezing a partially inflated balloon: the noise comes from air being forced through a narrow opening, not from anything being produced internally.

Unlike intestinal gas, which is generated by bacterial fermentation and contains compounds with a characteristic smell, vaginal air is simply room air that entered and exited the body. This distinction matters because the absence of odor is one reliable way to tell the two apart. If vaginal gas consistently carries a fecal smell, that is a different situation entirely and worth discussing with a doctor.

The Most Common Triggers

Sexual activity is the single most frequently reported trigger. In one cross-sectional study, intercourse was the activity that most often provoked vaginal flatus, reported by about half of the affected women.² A separate study examining precipitating factors found that about seven in ten women who experienced vaginal flatus identified intercourse as the trigger, with postural changes accounting for roughly one in five cases and physical activities around one in ten.³ The broader literature review identified additional sexual triggers, including digital stimulation and cunnilingus, both of which can introduce or shift air inside the vaginal canal.¹

During penetrative sex, the thrusting motion can act like a piston, repeatedly pushing air into the canal and then partially sealing it with each stroke. Certain positions that angle the pelvis upward or create more space between the vaginal walls seem to make this worse. Rear-entry positions, for example, tend to tilt the pelvis in a way that opens the vaginal canal more than face-to-face positions, giving air an easier path inward. Switching positions during sex can release air that was pushed in during the previous position.

Exercise is another well-known trigger, and it often causes more embarrassment than sex does. In the Iranian study, physical activities were the context in which vaginal flatus created the most inconvenience, with 92 percent of affected women reporting bother during exercise compared to other situations.² Yoga, Pilates, and stretching are common culprits because they involve inversions, deep hip flexion, and abdominal engagement that change the pressure dynamics around the pelvic floor. Running and jumping can also do it, though less predictably.

The Pelvic Floor Connection

The pelvic floor is a group of muscles and connective tissues that form a sling at the base of the pelvis, supporting the bladder, uterus, and rectum. The vaginal canal passes through this muscular sling, and the tone and integrity of these muscles influence how tightly the vaginal walls stay in contact with each other. When the pelvic floor is weakened or stretched, the canal may gap more easily, creating opportunities for air to enter.

Research on the anatomical factors behind vaginal flatus has identified several structural features that increase risk. Vaginal birth, pelvic organ prolapse in the central and posterior compartments, and anal incontinence are all associated with the condition.³ A longitudinal cohort study following women from mid-pregnancy through 12 months postpartum found that women who had given birth before were at substantially higher odds of experiencing vaginal flatus during pregnancy and after delivery. Independent structural risk factors included levator avulsion, a larger genital hiatus, and a shorter perineal body.⁴

The genital hiatus is the opening through the pelvic floor muscles that the vagina and urethra pass through. A wider opening means less muscular support holding the vaginal walls closed. The perineal body is the band of tissue between the vaginal opening and the anus; a shorter one provides less structural rigidity to the posterior vaginal wall. Levator avulsion refers to a tear or detachment of the levator ani muscle from its anchor point on the pubic bone, which can occur during vaginal delivery and permanently alters pelvic floor support.

One somewhat counterintuitive finding from the pelvic floor anatomy study was that higher levator resting tone and younger age were also associated with vaginal flatus.³ This suggests the relationship between pelvic floor function and queefing is not simply a matter of “weak muscles equal more air.” Higher resting tone might actually create a valve-like effect that traps air more effectively once it enters, leading to a more noticeable release when the muscles eventually relax.

Pregnancy and Postpartum Changes

Pregnancy itself can increase vaginal flatus even before delivery. The growing uterus shifts pelvic pressure, hormones like relaxin loosen connective tissue, and blood flow to the pelvic region increases, all of which change the mechanical behavior of the vaginal canal. The longitudinal cohort study found that multiparous women, those who had given birth at least once before the current pregnancy, had dramatically higher odds of vaginal flatus during pregnancy compared to first-time mothers.⁴

After delivery, vaginal flatus was the most common onset event reported in the Iranian study, with 45 percent of affected women tracing it to vaginal delivery. About a third reported it starting spontaneously with no clear precipitating event, and a smaller portion linked it to cesarean section or other pelvic surgery.² The cesarean section link is worth noting because it suggests that pregnancy alone, not just vaginal delivery, plays a role in altering the pelvic floor. Hormonal changes and the sustained weight of the uterus on pelvic structures during pregnancy can stretch tissues regardless of delivery method.

For many postpartum women, queefing resolves or decreases as pelvic floor muscles recover over the months following delivery. For others, especially those who experienced levator avulsion or significant perineal tearing, it can persist long-term. Pelvic floor physiotherapy is the most commonly recommended intervention in these cases, and there is reasonable clinical consensus that strengthening the levator ani and surrounding muscles can improve vaginal wall coaptation, the degree to which the walls stay in contact and prevent air from entering.

When Vaginal Gas Signals a Medical Problem

In the vast majority of cases, queefing is a biomechanical event and not a symptom of disease. But there are exceptions, and the key warning sign is odor. If vaginal gas consistently smells like stool, it may indicate a fistula, an abnormal passage connecting the rectum or colon to the vagina.

Rectovaginal and Colovaginal Fistulas

A rectovaginal fistula is a passage between the front wall of the rectum and the back wall of the vagina. It allows intestinal gas and sometimes liquid stool to pass through the vagina, which is very different from ordinary queefing. Women with this condition often experience recurrent vaginal infections, pain during sex, and vaginal irritation alongside the passage of gas and fecal material.⁵ Rectovaginal fistulas can result from obstetric injury, surgical complications, radiation therapy, or inflammatory bowel disease. In Crohn’s disease, fistulas are a recognized complication even in younger patients.⁶

Colovaginal fistulas work on the same principle but connect a section of the colon, rather than the rectum, to the vagina. These are rarer and often linked to diverticular disease. One case report described a 51-year-old woman who was referred to surgery after experiencing stool and gas leaking through the vagina, ultimately found to have a fistula caused by otherwise asymptomatic diverticular disease.⁷ Fistulas require surgical repair and do not resolve on their own.

Emphysematous Vaginitis

A much rarer condition, emphysematous vaginitis involves the formation of small gas-filled cysts within the vaginal wall itself. Unlike queefing, which involves external air entering and leaving, this condition involves gas pockets embedded in the tissue. It is considered benign and self-limiting, meaning it tends to resolve without specific treatment.⁸ The characteristic appearance on imaging is circumferential gas along the vaginal wall, which can look alarming but needs to be distinguished from necrotizing soft tissue infections, a far more dangerous condition.⁹ Emphysematous vaginitis is relevant here mainly because it can cause sensations and sounds similar to queefing but originates from a completely different mechanism.

The Emotional Weight of a Harmless Sound

The reason queefing gets so much attention relative to its medical significance is embarrassment. The sound mimics flatulence, and flatulence carries social stigma. For something that is physiologically unremarkable, it can cause a surprising amount of distress.

Research on women with pelvic floor disorders found that those who experienced vaginal flatus had significantly worse sexual function scores compared to those who did not. Nearly half of women with the symptom reported it happening often or always during sexual activity, and about 60 percent found it at least moderately bothersome in that context.¹⁰ The same study found that bother levels were much lower during daily activities (about 5 percent reported moderate bother) and exercise (about 18 percent), suggesting the sexual context amplifies the emotional impact considerably. The overall prevalence of embarrassment in the Iranian community study was lower, around 6 percent of affected women, though cultural norms and survey settings likely influence how freely women report distress.²

The gap between how common and benign queefing is and how much distress it causes in sexual situations suggests a communication problem more than a medical one. Partners who understand the mechanics, that air was pushed in and is now coming out, tend to find it unremarkable. Partners who do not understand it may react in ways that deepen the embarrassment. This is one of those cases where a brief, matter-of-fact explanation can do more than any treatment.

Practical Ways to Reduce It

Because queefing is not a disease, there is no formal treatment protocol. But there are practical strategies that many women find helpful, grounded in the biomechanics of how air enters the vagina.

Adjust positions: During sex, positions that tilt the pelvis downward rather than upward tend to trap less air. Face-to-face positions generally introduce less air than rear-entry ones. Minimizing the number of position changes during a single session can also help, since each transition is an opportunity for air to shift.
Slow transitions: During yoga or Pilates, moving slowly between poses, especially inversions like downward dog or shoulder stands, gives air less opportunity to rush in. Engaging your pelvic floor muscles as you transition can help keep the vaginal walls closer together.
Pelvic floor exercises: Strengthening the muscles around the vagina can improve how tightly the walls stay in contact at rest, reducing the likelihood of air entering. These exercises are most effective when done consistently over weeks and months, and a pelvic floor physiotherapist can help ensure you are targeting the right muscles with the right technique.
Exhale before standing: After positions that open the pelvis wide, like deep squats or certain stretches, a deliberate exhale while engaging your core before returning upright can help expel trapped air in a controlled way rather than in a sudden burst.

None of these strategies will eliminate queefing entirely, and that is a reasonable expectation to set. The anatomy involved is flexible and responsive to movement, which is a feature of healthy tissue, not a defect. A vaginal canal that never admitted any air would be one that never changed shape, which would mean it was not functioning normally during sex, exercise, or even routine movement.

Queefing After Menopause

Hormonal changes after menopause affect vaginal tissue in ways that can both increase and decrease queefing, depending on the individual. Declining estrogen levels cause the vaginal walls to thin and lose some elasticity, a process known as vaginal atrophy. Thinner, less elastic tissue may gap more easily in some women, potentially increasing air entry. At the same time, reduced lubrication and decreased blood flow can make the vaginal canal narrower and less distensible, which in some women reduces the space available for air trapping.

The pelvic floor continues to change with age independent of hormonal shifts. Connective tissue weakens over time, and pelvic organ prolapse becomes more common. Women who develop prolapse, particularly of the posterior vaginal wall, may notice new or increased vaginal flatus. This is one of the reasons that pelvic floor strengthening is recommended not only postpartum but throughout life, and why some clinicians suggest it as a preventive measure well before symptoms appear.

Why the Research Is Thin

Given how common queefing is, it is striking how little formal research exists on the topic. One literature review noted that the pathophysiology remains unclear and the true incidence unknown, with available studies using highly variable methods and definitions.¹ The prevalence figures range so widely, from one to 69 percent, partly because researchers have not settled on a standard way to ask about it. Some studies ask about any lifetime occurrence, others about regular occurrence, and others only about bother. The stigma surrounding the topic likely suppresses reporting in all of these contexts.

Funding also plays a role. Conditions that are embarrassing but not dangerous tend to attract less research attention than those that are medically urgent. Vaginal flatus sits in a category alongside other quality-of-life concerns, like stress incontinence and pelvic pain, that affect millions of women but have historically been underresearched relative to their prevalence. The studies that do exist are disproportionately focused on women who already have pelvic floor disorders, which makes it hard to know how much of what we learn from that population applies to women without those conditions. The younger, healthier women who queef during yoga class and wonder why are largely absent from the literature.

1
European Journal of Obstetrics & Gynecology and Reproductive Biology. Vaginal wind: A literature review
2
PubMed Central. Vaginal Flatus and the Associated Risk Factors in Iranian Women: A Main Research Article
3
PubMed. Is vaginal flatus related to pelvic floor functional anatomy?
4
PubMed Central. Prevalence and Risk Factors for Vaginal Flatus From Mid-Pregnancy to 12 Months Postpartum: A Longitudinal Cohort Study
5
International Journal of Surgery Case Reports. Recto-vaginal fistulas: A case series
6
PubMed Central. Martius flap closure of rectovaginal fistula in a 12-year-old girl with Crohn’s disease
7
Journal of Surgical Case Reports. Colovaginal and colo-ovarian fistula at a patient with asymptomatic diverticular disease
8
PubMed Central. Emphysematous vaginitis in a gravid woman
9
PubMed. Computed tomography features of emphysematous vaginitis: anatomic distribution and pattern recognition
10
PubMed. The Prevalence of Vaginal Flatus in Women With Pelvic Floor Disorders and Its Impact on Sexual Function