Squirting is the involuntary release of fluid from the bladder during sexual arousal or orgasm, triggered by intense stimulation of nerve-rich tissue along the front vaginal wall. Estimates suggest somewhere between 10% and 54% of women experience it, a wide range that reflects how variable the response is from person to person. The mechanics involve a combination of anatomy, arousal, and relaxation, and the process is better understood now than even a decade ago thanks to ultrasound and biochemical studies.
What Actually Happens in the Body
Squirting involves the rapid filling and emptying of the bladder during high arousal. A 2015 ultrasound study by Salama and colleagues tracked what happens in real time: participants emptied their bladders, confirmed empty on ultrasound, then engaged in sexual stimulation. A second scan taken just before squirting showed noticeable bladder filling, and a third scan immediately after showed the bladder had emptied again. The fluid had accumulated in the bladder during arousal and was expelled through the urethra.
A later study in 2022 confirmed this by inserting a catheter, emptying the bladder completely, and then injecting blue dye into it. The fluid released during squirting was blue in every case, confirming the bladder as the source. The chemistry of the fluid backs this up: it contains urea, creatinine, and uric acid, all markers of urine produced by the kidneys.
That said, squirting fluid isn’t identical to regular urine. It often contains small amounts of prostatic enzymes and sugars that come from the Skene’s glands, two small structures on either side of the urethra. This suggests that squirting and a separate process called female ejaculation can overlap, mixing bladder fluid with glandular secretions.
Squirting vs. Female Ejaculation
These two terms are often used interchangeably, but they describe different things. Female ejaculation is the release of about 1 milliliter of thick, white, milky fluid from the Skene’s glands. Its composition resembles components of male semen, containing prostatic enzymes, fructose, and glucose. The Skene’s glands develop from the same embryonic cells that become the prostate in males, which is why some researchers call them the “female prostate.”
Squirting, by contrast, involves a much larger volume: tens to hundreds of milliliters of clear fluid from the bladder. Many women who squirt are also ejaculating at the same time, which is why the squirting fluid sometimes contains traces of those glandular secretions. But the volume difference is the key distinction. The small amount of milky ejaculate is glandular. The larger gush is primarily diluted urine that the bladder collected during arousal.
The Role of the G-Spot Area
The most common physical trigger for squirting is firm, rhythmic pressure on the front wall of the vagina, the area traditionally called the G-spot. Modern anatomy has reframed this area as the clitorourethrovaginal complex, a zone where several structures converge: the internal branches of the clitoris (which extend several inches around the vaginal canal), spongy erectile tissue that swells with blood during arousal, and dense nerve pathways that transmit intense sensation.
When this area is stimulated, blood flow increases and the surrounding tissue becomes engorged. The Skene’s glands, embedded in this tissue, swell and secrete fluid. At the same time, the kidneys appear to rapidly produce and send fluid to the bladder. The combination of pressure on the front vaginal wall, clitoral engorgement, and a building sensation of fullness creates the conditions for squirting. The release itself is involuntary, driven by rhythmic contractions of the pelvic floor muscles.
Why Hormones and Blood Flow Matter
Sexual arousal depends heavily on blood flow to the genitals, and that blood flow is regulated by hormones. Estrogen plays a particularly important role. Research from Boston University found that when estrogen levels drop (as happens after menopause or certain surgeries), vaginal and clitoral blood flow during stimulation decreases significantly. The vaginal lining thins, the small blood vessels beneath it shrink, and erectile tissue in the clitoris can develop scarring. Restoring estrogen brought blood flow back to normal levels in animal studies.
Testosterone, interestingly, did not have the same restorative effect on genital blood flow. This suggests that estrogen is the more critical hormone for the engorgement response that makes the front vaginal wall sensitive enough to trigger squirting. It may partly explain why some women notice changes in their ability to squirt at different life stages or with hormonal shifts.
The Mental and Physical State That Makes It Possible
Anatomy and stimulation are only part of the picture. Emotional comfort, the level of arousal, and even body position all influence whether squirting occurs. The sensation just before squirting often feels similar to needing to urinate, which makes sense given that the fluid is coming from the bladder. Many women instinctively tense up at that point, which can prevent the release.
Relaxation of the pelvic floor is essential. Deep, rhythmic breathing can help release tension in those muscles. Hydration also plays a practical role, since the bladder needs adequate fluid volume to produce the response. Being well-hydrated before sexual activity and allowing yourself to relax through the sensation of pressure, rather than clenching against it, are the two most commonly cited factors that make the difference between building toward squirting and stopping short of it.
There is significant natural variation in the size and activity of the Skene’s glands from person to person. Some women have larger, more active glands and more responsive nerve pathways in the front vaginal wall. Others have smaller glands or less sensitivity in that area. This anatomical variability is the main reason some women squirt easily, some can with specific stimulation, and some never do regardless of technique.