Pain during sex affects 10% to 20% of women in the United States, and it’s also common in men, though less frequently studied. The causes range from simple friction and dryness to underlying medical conditions that need treatment. Where and when the pain occurs tells you a lot about what’s behind it.
Pain at the Entrance vs. Deep Pain
Sexual pain generally falls into two categories, and the distinction matters because each points to different causes. Pain at the vaginal opening, felt during initial penetration, is typically related to the skin, muscles, or tissue right at the surface. Deep pain, felt during full penetration, usually signals something happening further inside the pelvis, like a condition affecting the uterus, ovaries, or bowel.
Some people experience both types at once, and pain can also show up only in certain positions or only at certain times of the month. Paying attention to these patterns helps narrow down the cause.
Infections and Skin Conditions
Some of the most common and most treatable causes of painful sex are infections. Yeast infections, bacterial vaginosis, urinary tract infections, and sexually transmitted infections like chlamydia or herpes can all inflame tissue and make penetration uncomfortable or outright painful. The pain typically improves once the infection clears.
Skin conditions on the vulva can also be responsible. Conditions like lichen sclerosus or lichen planus cause thinning, irritation, or scarring of the skin around the vaginal opening. Even reactions to harsh soaps, fragranced products, or certain laundry detergents can irritate vulvar tissue enough to cause pain during sex.
Hormonal Changes and Vaginal Dryness
Estrogen plays a major role in keeping vaginal tissue thick, moist, and flexible. When estrogen levels drop, the vaginal lining becomes thinner, drier, and less stretchy. The vaginal canal can actually narrow and shorten, and normal lubrication decreases. All of this makes tissue more fragile and more likely to feel painful with friction.
This most commonly happens during perimenopause and menopause, but it’s not limited to older adults. Breastfeeding, certain birth control methods, cancer treatments like chemotherapy and radiation, and surgical removal of the ovaries can all lower estrogen enough to cause these changes. The condition tends to worsen over time without treatment, since the tissue continues to thin as estrogen stays low.
For mild dryness, over-the-counter vaginal moisturizers used every few days can help restore some moisture, and water- or silicone-based lubricants reduce friction during sex. For more significant tissue changes, vaginal estrogen (available as creams, rings, tablets, or suppositories) directly restores thickness and moisture to vaginal tissue. A topical numbing gel applied to the vaginal opening 5 to 10 minutes before sex can also reduce pain in the short term.
Involuntary Muscle Tightening
Vaginismus is an involuntary tensing of the vaginal muscles that happens when penetration is anticipated or attempted. You can’t control it, and the tightening can range from mildly uncomfortable to intensely painful. For some people, it makes penetration impossible.
The leading theory is that fear of pain triggers the pelvic floor muscles to clamp down automatically, creating a cycle: the anticipation of pain causes tightening, the tightening causes pain, and the pain reinforces the fear. This can develop after a painful experience, after trauma, or sometimes without any clear trigger.
Pelvic Floor Dysfunction
Even without vaginismus specifically, problems with the pelvic floor muscles can cause sexual pain. These muscles form a hammock-like structure across the base of the pelvis, supporting the bladder, uterus, and rectum. When they’re chronically tight, weak, or uncoordinated, sex can hurt.
Pelvic floor physical therapy is one of the most effective treatments for muscle-related sexual pain. It typically involves hands-on techniques, biofeedback (which uses sensors to help you learn to control the muscles), home exercises, and sometimes vaginal dilators to gradually increase comfort with penetration. Studies show that 45% to 80% of women report improvement in sexual pain after a course of treatment, depending on the underlying condition. For vaginismus specifically, internal manual techniques performed by a therapist tend to be the most effective approach, often combined with gradual dilation exercises at home.
Endometriosis and Pelvic Conditions
Deep pain during sex is one of the hallmark symptoms of endometriosis, a condition where tissue similar to the uterine lining grows outside the uterus, often on the fallopian tubes, ovaries, or the tissue lining the pelvis. This tissue responds to hormonal cycles, causing inflammation, scarring, and pain that can flare during deep penetration.
Other conditions that cause deep pain include ovarian cysts, uterine fibroids, pelvic inflammatory disease (an infection of the reproductive organs, usually from untreated STIs), and adenomyosis (where uterine lining tissue grows into the muscular wall of the uterus). A retroverted uterus, which tilts backward instead of forward, can also make certain positions painful. Pelvic scarring from prior surgery, including hysterectomy, is another common culprit.
Bladder and Bowel Conditions
The bladder sits directly in front of the vagina, and the bowel sits behind it, so inflammation in either one can make sex painful. Interstitial cystitis, a chronic bladder condition that causes pressure and pain, frequently causes discomfort during intercourse. Chronic urinary tract infections can do the same.
On the bowel side, irritable bowel syndrome, Crohn’s disease, ulcerative colitis, and even hemorrhoids can all contribute to pain during penetration. The pain tends to worsen with deeper penetration and in positions that put more pressure on the affected area.
Nerve-Related Pain
Nerve problems are an underrecognized cause of sexual pain. A pinched nerve in the lower back, pudendal nerve issues (the pudendal nerve runs through the pelvis and supplies sensation to the genitals), and general nerve inflammation can all produce burning, shooting, or stabbing pain during sex. Vulvodynia, a condition defined as vulvar pain lasting at least three months without an identifiable cause, may involve nerve hypersensitivity, though researchers aren’t certain of the exact mechanism. It affects 10% to 28% of women of reproductive age at some point in their lives.
Pain During Sex for Men
Men experience sexual pain less frequently, but it does happen. Prostatitis, inflammation of the prostate gland, is one of the most common causes. It can produce pain during ejaculation, along with pain in the groin, lower abdomen, or perineum. A tight foreskin that doesn’t retract easily can cause pain during penetration. Peyronie’s disease, which involves scar tissue forming inside the penis and causing curvature, can make erections and intercourse painful. Infections, including STIs and urinary tract infections, can also cause burning or pain during sex in men.
Postpartum Pain
Pain during sex after childbirth is extremely common and often underestimated. About 40% of women who have had a vaginal delivery report painful sex three months after giving birth, and 20% still experience it at six months. Hormonal shifts (especially while breastfeeding, which suppresses estrogen), healing from tears or episiotomies, and changes in pelvic floor muscle tone all contribute. For most people this improves gradually, but persistent pain beyond six months is worth addressing with a healthcare provider.
How the Cause Gets Identified
Pinpointing what’s behind sexual pain usually starts with a detailed history: where the pain is, when it started, whether it happens every time or only in certain situations, and what it feels like. A physical exam typically includes checking the vulva and vagina for visible irritation, testing for infections with swabs or cultures, and using a cotton swab to map exactly where the pain is located and how severe it is at each spot. A pelvic floor assessment checks whether the muscles are overactive or tender. Imaging or further testing may be needed if a deeper condition like endometriosis or ovarian cysts is suspected.
Because so many different conditions can cause pain during sex, the diagnostic process is often one of elimination, ruling out infections, skin conditions, and structural problems before arriving at diagnoses like vulvodynia. Keeping track of when pain occurs, what makes it better or worse, and where exactly you feel it gives your provider the most useful information to work with.