The perineum is the diamond-shaped area of soft tissue between your genitals and your anus. It sits at the very bottom of your pelvis, forming a muscular floor that supports your pelvic organs and plays a key role in bladder control, bowel function, and sexual sensation. Though it’s a small region, it contains a dense network of muscles, nerves, and connective tissue that matters far more than its size suggests.
Where the Perineum Is and What It Looks Like
If you were to look at the perineum from below, it forms a rough diamond shape. The front point sits at the pubic bone, the back point at the tailbone, and the two side points sit at the bony prominences you feel when you sit on a hard surface (the ischial tuberosities, or “sit bones”). An imaginary line drawn between those two sit bones divides the perineum into two triangles: a front triangle surrounding the genitals and urethra, and a back triangle surrounding the anus.
The front triangle differs between sexes. In people with female anatomy, it contains the vaginal opening, the urethra, and the clitoris. In people with male anatomy, it contains the base of the penis and the urethra. The back triangle is the same in everyone, housing the anal canal and two fat-filled spaces on either side that cushion the area during sitting.
The Perineal Body: A Hidden Structural Hub
At the center of the perineum sits a small but critical structure called the perineal body. This is a dense knot of connective tissue where at least nine different muscles converge, including the muscles that control urination, the external anal sphincter, and several pelvic floor muscles. Think of it as the keystone of an arch: it holds the surrounding structures in position and helps balance the mechanical forces generated by your bladder, bowel, and reproductive organs.
The perineal body is especially important in people with female anatomy. During vaginal delivery, this structure can tear, potentially widening the gap between the pelvic floor muscles on both sides. When that happens, it increases the risk of later prolapse of the rectum, uterus, or bladder. Maintaining the integrity of the perineal body is essential for continence and long-term pelvic support.
How the Perineum Gets Its Sensation
Nearly all sensation in the perineum comes from one nerve: the pudendal nerve, which originates from the lower spinal cord (the S2 through S4 levels). This nerve splits into three main branches as it travels through the region. One branch supplies the anal canal and surrounding skin. A second branch, the perineal nerve, divides further into a deep branch that controls the muscles of the pelvic floor and a superficial branch that carries sensation from the skin of the scrotum or labia. The third branch is the dorsal nerve of the penis or clitoris, responsible for sensation in those structures.
Because the pudendal nerve handles motor control of both the external urethral sphincter and the external anal sphincter, damage to this single nerve can affect both bladder and bowel continence, along with sexual function. The nerve runs through a narrow canal on the side wall of the pelvis, which makes it vulnerable to compression, particularly from prolonged sitting or cycling.
Perineal Tears During Childbirth
About 9 out of 10 women experience some form of perineal trauma during vaginal delivery, whether from spontaneous tearing or from a surgical cut (episiotomy). Tears are graded from first degree, involving only the skin, through fourth degree, which extends into the anal sphincter complex. First- and second-degree tears are the most common and generally heal well.
The skin portion of a tear typically heals within a few weeks. During recovery, ice packs wrapped in a towel can reduce swelling and pain. Pouring warm water over the area while urinating helps with stinging. Drinking at least two liters of water daily and eating fiber-rich foods prevents constipation, which matters because straining puts pressure on healing tissue. Starting pelvic floor exercises as soon as possible after birth strengthens the surrounding muscles and supports the healing process.
A Cochrane review of four trials involving nearly 2,500 women found that perineal massage during the last month of pregnancy, done as little as once or twice a week starting at 35 weeks, reduced the likelihood of tears requiring stitches and lowered the chance of episiotomy by about 16%. These benefits were most significant for first-time mothers. Women who had previously given birth vaginally saw a notable reduction in ongoing pain at three months postpartum.
Chronic Perineal Pain
Pain in the perineum that persists outside of childbirth recovery often points to pudendal neuralgia, a condition caused by irritation or compression of the pudendal nerve. The hallmark symptom is perineal pain that worsens while sitting and improves when you stand, lie down, or sit on a toilet seat (which takes pressure off the nerve). The pain does not typically wake people at night.
People with pudendal neuralgia describe the sensation as burning, tingling, stabbing, or like an electric shock. In more than half of cases, sitting is the primary trigger. The pain may stay localized to the perineum or spread to the vulva, vagina, or clitoris in women, and to the glans, scrotum, or rectum in men. Some people develop referred pain as far away as the calf or foot. Associated symptoms can include urinary urgency, painful ejaculation, pain during intercourse, and a persistent sensation of sitting on a golf ball or having a foreign object in the rectum or vagina.
In men specifically, unexplained perineal discomfort while seated can occasionally signal prostate problems. Case reports have documented perineal pain or tingling as an early symptom of prostate cancer, sometimes appearing before other urological signs.
Why Pelvic Floor Health Matters
Because the perineum serves as the anchor point for so many pelvic floor muscles, its health directly affects everyday functions most people take for granted: holding urine when you sneeze, controlling gas, and maintaining sexual sensation. Pelvic floor exercises (often called Kegels) strengthen the muscles that attach to the perineal body, improving support for the bladder, bowel, and reproductive organs. These exercises benefit all sexes, not just postpartum women. People who cycle long distances, sit for extended periods, or have chronic constipation put extra stress on the perineum and may benefit from targeted strengthening and pressure management, like using a properly fitted bike saddle or taking regular standing breaks.