Pain during sex is common, and it almost always has an identifiable, treatable cause. Roughly 10 to 20 percent of women experience it at some point, and the number climbs significantly after menopause. The pain can show up at the entrance of the vagina, deep inside the pelvis, or both, and where you feel it is one of the biggest clues to what’s behind it.
Entry Pain vs. Deep Pain
The single most useful distinction is whether the pain happens at the vaginal opening or deeper inside during penetration. Entry pain (sometimes called superficial pain) points toward causes involving the skin, muscles, or nerves of the vulva and vaginal entrance. Deep pain, felt in the lower abdomen or pelvis during thrusting, usually signals something going on with internal organs like the uterus, ovaries, or surrounding tissue.
Knowing which type you’re experiencing helps narrow the list of causes considerably, so it’s worth paying attention to exactly where and when the pain occurs.
Common Causes of Pain at the Entrance
Infections
Vaginal yeast infections are one of the most straightforward causes. They create vulvar swelling, redness, soreness, and sometimes small skin fissures that make penetration painful. Bacterial vaginosis and sexually transmitted infections like trichomoniasis or chlamydia can cause similar inflammation. If you’re also noticing unusual discharge, itching, or a burning sensation when you urinate, an infection is a likely culprit.
Vulvodynia
Vulvodynia is chronic discomfort in the vulvar area that ranges from mild to severe. What makes it distinct is that even light touch, like the pressure of a cotton swab, can trigger disproportionate pain. Biopsies of affected tissue show increased nerve density and branching compared to unaffected tissue, which helps explain why the area becomes hypersensitive. There’s no visible rash or sore to point to. The diagnosis typically comes after infections and skin conditions have been ruled out.
Pelvic Floor Muscle Tension
The muscles surrounding the vaginal opening can involuntarily tighten in response to anticipated pain or anxiety. This is sometimes called vaginismus, and it creates a cycle: penetration hurts, so the muscles clench next time, which makes it hurt more, which increases the clenching. A clinician can usually identify this during an exam by feeling for spasm in the pelvic floor muscles. This is one of the most responsive conditions to treatment, which is worth knowing if you’ve been dealing with it for a while.
Not Enough Lubrication
Insufficient lubrication creates friction that leads to soreness, micro-tears, and burning. This can happen for simple reasons: not enough foreplay, certain medications (antihistamines, some antidepressants), or dehydration. It can also be hormonal, which brings us to one of the most underrecognized causes.
How Hormonal Changes Affect Vaginal Tissue
Estrogen does a lot of behind-the-scenes work for vaginal comfort. It maintains the thickness and elasticity of vaginal walls, supports blood flow to the area, and keeps glands producing moisture and lubrication. When estrogen drops, as it does during menopause, breastfeeding, or with certain medications, the tissue thins, loses elasticity, and dries out. Blood flow decreases. The glands that produce lubrication shrink.
The result is tissue that’s fragile, slow to lubricate with arousal, and prone to small tears during penetration. Unlike hot flashes, which often improve over time after menopause, these vaginal changes tend to get worse with age if left unaddressed. Prevalence estimates for these symptoms in postmenopausal women range from 13 to 87 percent depending on how the question is asked, which suggests many women either don’t report it or don’t connect it to hormonal changes.
Causes of Deep Pelvic Pain
Endometriosis
Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus, typically in the pelvic region. This tissue responds to hormonal cycles just like the uterine lining does, swelling and breaking down each month but with no way to exit the body. The result is inflammation, scarring, and pain, particularly during deep penetration that puts pressure on affected areas. Pain during sex is one of the hallmark symptoms alongside painful periods and chronic pelvic pain.
Pelvic Congestion Syndrome
This condition involves enlarged veins in the pelvis, similar to varicose veins in the legs. Blood pools in these weakened veins instead of circulating back to the heart, creating pressure, inflammation, and a deep aching pain. Sex can worsen the discomfort because of increased blood flow to the pelvic area.
Other Internal Causes
Ovarian cysts, uterine fibroids, and pelvic inflammatory disease (an infection of the reproductive organs, often from untreated STIs) can all cause deep pain during sex. These conditions typically come with other symptoms too: irregular periods, persistent pelvic aching between sexual activity, or changes in bladder or bowel habits.
The Role of Anxiety and Past Experience
Pain during sex isn’t purely physical for many people. Research supports what’s called the fear-avoidance model: a painful experience during sex triggers anxiety about future encounters, which leads to involuntary muscle tension, which causes more pain, which reinforces the fear. Vaginal tension has been specifically identified as a fear response to painful intercourse.
This doesn’t mean the pain is “in your head.” The muscle tension and resulting pain are completely real and measurable. But it does mean that for some people, treating only the physical cause isn’t enough. The nervous system has learned to brace for pain, and that pattern needs its own intervention. Past sexual trauma, relationship stress, and generalized anxiety can all feed into this cycle.
What Treatment Looks Like
Treatment depends entirely on the cause, which is why identifying the specific type and location of your pain matters so much.
For infections, the fix is usually medication that clears the underlying infection and gives inflamed tissue time to heal. For hormonal changes, options include vaginal moisturizers for day-to-day comfort, lubricants during sex, and for more significant tissue changes, localized hormone therapy that restores thickness and elasticity to vaginal walls.
Pelvic floor physical therapy is one of the most effective treatments for pain related to muscle tension, vaginismus, and vulvodynia. It’s a structured program focused on retraining pelvic floor muscles to relax rather than clench. Techniques include internal manual therapy (where a therapist works directly on tight muscles), biofeedback to help you feel and control muscles you may not be aware of, and graduated use of vaginal dilators to slowly increase comfort with penetration. One study found significant improvement in pain scores after just five weeks of twice-weekly sessions, with benefits lasting over four months. Internal manual techniques were the most effective component, followed by patient education and at-home dilation exercises.
For conditions like endometriosis or pelvic congestion syndrome, treatment addresses the underlying condition itself and may involve hormonal management or, in some cases, surgical intervention.
When the fear-avoidance cycle is part of the picture, working with a therapist who specializes in sexual pain can help interrupt the pattern of anticipatory anxiety and involuntary guarding.
Signs That Need Prompt Attention
Most causes of painful sex are not emergencies, but certain symptoms alongside pain warrant a timely visit to a healthcare provider: bleeding during or after sex, genital lesions or sores, abnormal vaginal discharge, irregular periods, or pain that is new, worsening, or significantly different from what you’ve experienced before. Bleeding with sex in particular can be benign but can also signal an infection or an underlying condition that needs evaluation.