Painful sex is common, affecting roughly 12% to 21% of women in community surveys, and it happens to men too. The causes range from something as simple as insufficient lubrication to conditions like endometriosis, hormonal changes, muscle tension disorders, or the lingering effects of trauma. Pain can show up at the entrance of the vagina, deep in the pelvis, or anywhere in between, and where it occurs is often the biggest clue to what’s causing it.
Where the Pain Occurs Matters
Pain during sex generally falls into two categories based on location. Superficial pain happens at or near the vaginal opening during initial penetration. Deep pain is felt further inside the pelvis, often with thrusting. Some people experience pain in the middle of the vaginal canal, which points to a different set of causes than either superficial or deep pain. Sorting out the location is the first step toward identifying the underlying problem, because the list of possible causes for each is almost entirely different.
Not Enough Lubrication
This is the most straightforward and most common reason sex hurts. Without adequate moisture, friction against vaginal tissue creates a burning or raw sensation, and the tissue can develop tiny tears. Arousal triggers natural lubrication, so rushing into penetration before the body is ready is a frequent culprit. Stress, certain medications (especially antihistamines and some antidepressants), dehydration, and hormonal shifts can all reduce the body’s ability to self-lubricate.
A store-bought lubricant can make an immediate difference. Water-based options are the most widely compatible with condoms and toys. The World Health Organization recommends lubricants with an osmolality below 1,200 mOsm/kg and a pH around 4.5, which matches the vagina’s natural environment and minimizes irritation. Products that fall outside those ranges can damage the vaginal lining and actually make discomfort worse over time. Checking the label or looking for products that specifically reference WHO guidelines is worth the effort.
Hormonal Changes and Menopause
As estrogen and androgen levels drop during perimenopause and menopause, the tissues of the vulva and vagina change significantly. The vaginal lining thins, loses its natural folds, and produces less moisture. The opening can narrow. The tissue becomes fragile enough to tear or bleed during intercourse, sometimes even from light contact. This collection of changes is called genitourinary syndrome of menopause (GSM), and it tends to get worse over time without treatment because the tissue continues to lose estrogen support.
Visible signs include pale or smooth-looking vaginal tissue, loss of the inner labia, and a vaginal pH that rises above 5.0 as the normal bacterial balance shifts. Many people assume dryness is the only issue, but the structural changes to the tissue itself are often the bigger problem. Lubricants help with friction, but they don’t reverse thinning or narrowing. Topical estrogen therapy, applied directly to vaginal tissue, can restore thickness and elasticity for many people. Hormonal changes after childbirth and during breastfeeding can produce similar (though usually temporary) effects.
Pelvic Floor Muscle Tension
The pelvic floor is a group of muscles that supports the bladder, uterus, and rectum. When those muscles involuntarily tighten during attempted penetration, the result can range from a tight, burning sensation to a complete inability to have penetrative sex. This condition, historically called vaginismus, is now grouped with painful intercourse under the diagnosis genito-pelvic pain/penetration disorder (GPPPD).
The leading explanation is a self-reinforcing cycle: fear of pain triggers the muscles to clamp down, which causes pain, which reinforces the fear. The tightening is involuntary. It can develop from the very first attempt at penetration, or it can appear later in life after a painful experience, an infection, or a difficult relationship. Pelvic floor physical therapy is the most common treatment. A specialized therapist works with you to retrain the muscles to relax, often using gradual dilation exercises, breathing techniques, and biofeedback. Many people see meaningful improvement within a few months.
Endometriosis and Deep Pelvic Pain
Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus, often on the ovaries, fallopian tubes, or the tissue lining the pelvis. It is one of the most common causes of deep pain during sex. Research published in a 2023 study found that the presence of endometrial nodules in the retrocervical region (the area just behind the cervix) was the strongest predictor of painful intercourse in people with endometriosis, increasing the odds of pain more than fivefold compared to those without nodules in that location.
The pain typically worsens with deep penetration because thrusting pushes against or stretches tissue where the growths are located. Certain positions may be more painful than others depending on where the endometriosis is. Ovarian cysts, pelvic adhesions (bands of scar tissue that form after surgery or infection), and fibroids can produce similar deep pain through the same basic mechanism: something in the pelvis is being pressed or pulled in a way it shouldn’t be.
Infections and Skin Conditions
Yeast infections, bacterial vaginosis, and sexually transmitted infections like herpes or chlamydia can all inflame vaginal and vulvar tissue enough to make sex painful. The pain is usually superficial, accompanied by other symptoms like unusual discharge, itching, or visible sores. Treating the infection resolves the pain.
Chronic skin conditions are a less obvious but important cause. Lichen sclerosus, for example, causes white, patchy, thinning skin on the vulva that itches intensely and bruises or tears easily. Over time it can scar the tissue, including burying the clitoris under scar tissue and narrowing the vaginal opening. Painful sex is a hallmark symptom. Lichen sclerosus requires ongoing management, usually with a prescription steroid ointment, to control symptoms and prevent progressive scarring.
Vulvodynia, chronic pain or burning at the vulva without an identifiable infection or skin disease, is another possibility. The pain can be constant or triggered only by touch or pressure. Its exact cause isn’t fully understood, but nerve sensitization and inflammation in the vestibular glands are thought to play a role.
Pain During Sex in Men
Men experience painful sex less often than women, but it does happen. Prostatitis, inflammation of the prostate gland, is one of the more common causes. Symptoms include pain in the penis or testicles, painful ejaculation, and sometimes difficulty maintaining an erection. Chronic prostatitis can persist for months and is notoriously difficult to treat when no bacterial infection is found.
A tight foreskin (phimosis) can make penetration painful or impossible because the skin can’t retract fully. Peyronie’s disease, where scar tissue inside the penis causes it to curve sharply, can produce pain during erections and intercourse. Infections like urethritis or genital herpes cause pain in men just as they do in women.
Trauma, Anxiety, and the Pain Cycle
A history of sexual assault or abuse changes how the body responds to sexual situations. Research from the National Center for PTSD shows that survivors of sexual assault commonly experience decreased sexual interest, increased physical pain during consensual sex, and avoidance of intimacy as a way of coping with fear, anxiety, or traumatic memories that surface during sexual activity. The pain is not imagined. Anxiety and fear produce real physiological responses: muscles tense, blood flow changes, and the nervous system shifts into a protective mode that makes the body less receptive to touch.
Even without a trauma history, anxiety about sex itself can create or worsen pain. Performance pressure, body image concerns, or simply expecting pain because it happened before can trigger the same muscle guarding and reduced arousal that make sex hurt. This is why painful sex so often becomes a cycle. One painful experience creates anticipation of pain, which makes the next experience more likely to hurt. Breaking that cycle usually requires addressing both the physical and psychological components, often with a combination of pelvic floor therapy, counseling, and gradual reintroduction of sexual activity at a pace that feels safe.
Practical Steps That Help
Spending more time on foreplay increases natural lubrication and allows the vaginal canal to lengthen and relax, both of which reduce friction and pressure. Trying different positions can take pressure off sensitive areas, particularly for people with deep pain. Positions where the penetrated partner controls depth and speed tend to be more comfortable.
Using a quality lubricant with a pH near 4.5 and low osmolality reduces surface-level friction without irritating tissue. Silicone-based lubricants last longer than water-based ones and work well for people who need extra moisture, though they aren’t compatible with silicone toys. Communicating openly with a partner about what hurts, when it hurts, and what feels better is not a luxury; it’s one of the most effective tools available. Pain during sex has identifiable, treatable causes in the vast majority of cases, and most people see significant improvement once the right cause is identified.