Pain during sex that happens every single time is not normal, and you are far from alone in experiencing it. Estimates suggest that 10 to 28% of women will deal with this at some point in their lives. The medical term is dyspareunia, but what matters more than the name is understanding that consistent pain has a findable cause, and most causes are treatable. The first step is figuring out where exactly the pain shows up, because that points toward very different explanations.
Entry Pain vs. Deep Pain
The single most useful distinction is whether the pain happens right at the vaginal opening or deeper inside the pelvis. Entry pain (sometimes called superficial dyspareunia) tends to feel like burning, stinging, or tearing as penetration begins. It points toward causes involving the skin, the vaginal lining, infections, or the muscles right at the entrance. Deep pain, felt further inside during thrusting or certain positions, is more likely connected to conditions affecting the uterus, ovaries, bladder, or bowel.
Paying attention to this difference before you see a provider will help them narrow things down much faster.
Common Causes of Pain at the Opening
Vaginal Dryness and Tissue Changes
When estrogen levels drop, the vaginal lining becomes thinner, drier, less elastic, and more fragile. This creates friction-based pain that can feel raw or burning. Most people associate this with menopause, but it also happens during breastfeeding, after starting certain birth control pills, and in younger people with hormonal imbalances. A dry, thinned lining tears more easily, which is why you might also notice light bleeding afterward.
If your pain started around a hormonal shift, such as a new contraceptive, postpartum recovery, or perimenopause, dryness is one of the first things worth investigating. A provider can check vaginal pH with a simple strip test; a reading between 6.0 and 7.5 strongly suggests tissue thinning from low estrogen.
Infections and Irritants
Yeast infections, bacterial vaginosis, and trichomoniasis all inflame vaginal tissue and can make penetration painful. Bacterial vaginosis is the most common vaginal infection in women ages 15 to 44. Yeast overgrowth causes its own swelling and irritation. Sexually transmitted infections like chlamydia, gonorrhea, and herpes can also cause pain, especially if there are sores or ulcers present.
Less obviously, you can develop irritation from products you use every day. Vaginal sprays, douches, scented soaps, certain detergents, spermicides, and fabric softeners can all trigger burning, itching, and inflammation that makes sex painful. If your pain coincided with switching any of these products, that’s worth noting.
Skin Conditions on the Vulva
Lichen sclerosus is a chronic inflammatory skin condition that tends to affect the external genitalia. It can cause erosions, fissures, scarring, and fusion of the labia. In advanced cases, the vaginal opening narrows enough to make intercourse extremely painful or impossible. The condition often comes with a burning sensation that persists outside of sex too. It requires a biopsy to confirm and ongoing treatment to manage, but it responds well to topical therapy when caught early.
Involuntary Muscle Tightening
The pelvic floor muscles surround the vaginal opening. When these muscles go into a state of constant contraction or spasm, penetration feels like hitting a wall. This is sometimes called vaginismus or hypertonic pelvic floor. The tightening is involuntary, meaning you cannot simply relax your way through it, no matter how much you want to. It often develops after a painful experience (an infection, a rough exam, a traumatic event) that trained the muscles to clench protectively. Over time, the pattern becomes self-reinforcing: pain causes tightening, tightening causes more pain.
Beyond sex, a hypertonic pelvic floor can also cause urinary urgency, difficulty emptying the bladder, and constipation. If you notice any of those alongside painful sex, muscle tension is a likely contributor.
Common Causes of Deep Pain
Endometriosis
Endometriosis is one of the most common reasons for deep, recurring pain during sex. Tissue similar to the uterine lining grows outside the uterus, often on the ovaries, bowel, or the tissue lining the pelvis. These growths trigger a complex inflammatory response. The body produces pain-generating chemicals in the pelvic fluid that sensitize nearby nerves. New nerve fibers actually grow into and around the lesions, creating additional pain pathways that didn’t exist before.
Over time, this constant nerve stimulation can change how the central nervous system processes pain signals, making you more sensitive to stimuli that wouldn’t normally hurt. This is why endometriosis pain often worsens over the years and can feel disproportionate to what’s physically happening during sex. Deep thrusting in certain positions tends to be the worst because it pushes against inflamed tissue.
Other Pelvic Conditions
Ovarian cysts, fibroids, pelvic inflammatory disease, and conditions affecting the bladder or bowel can all produce deep pain with sex. Adenomyosis, a condition where tissue similar to the uterine lining grows into the muscular wall of the uterus itself, is another frequently overlooked cause. Pelvic congestion syndrome, which involves enlarged veins in the pelvis, can create a deep aching sensation during and after intercourse.
How Providers Figure Out the Cause
A thorough evaluation usually starts with a detailed conversation about where the pain is, when it started, and what makes it better or worse. The physical exam itself involves several targeted steps. A cotton swab test helps identify nerve-related pain: your provider gently presses a cotton swab against different spots on the vulva while you rate the pain at each location. This maps out exactly which areas are hypersensitive.
Depending on your symptoms, additional testing might include vaginal pH measurement, cultures for infections like gonorrhea, chlamydia, yeast, or bacterial vaginosis, and a transvaginal ultrasound to look for cysts, masses, or structural differences. If your provider suspects pelvic floor muscle problems, they may use graduated vaginal dilators to assess how your muscles respond to progressively larger sizes, revealing involuntary spasms that you might not be aware of. Visible skin changes on the vulva typically call for a small tissue biopsy.
None of these tests are especially invasive, and a good provider will walk you through each step. If your current provider dismisses your pain or rushes through the exam, seeking a second opinion is reasonable.
What Treatment Looks Like
Treatment depends entirely on the underlying cause, which is why getting an accurate diagnosis matters so much. Hormonal dryness responds to topical estrogen or moisturizers. Infections clear with the appropriate medication. Skin conditions like lichen sclerosus need ongoing topical therapy to prevent progression.
For pelvic floor muscle problems, pelvic floor physical therapy is one of the most effective options. A typical program combines hands-on techniques to release trigger points in the pelvic floor, exercises to retrain the muscles, and sometimes gentle electrical stimulation for pain relief. In a controlled trial, women who completed a course of pelvic floor rehabilitation saw dramatic improvements in both pain scores and sexual function, and those improvements held up three months after treatment ended. The therapy involves internal work, which can feel vulnerable at first, but it is done gradually at your pace.
Endometriosis and other structural conditions may require hormonal management or, in some cases, surgery. The right approach depends on severity, your symptoms, and your goals.
Why Pain Gets Worse Over Time
One reason consistent pain during sex tends to escalate rather than resolve on its own is that the nervous system adapts to repeated painful input. When you experience pain in the same area over and over, the nerves in that region become more sensitive, and the brain starts amplifying those signals. This process, called central sensitization, means that touch or pressure that wouldn’t have hurt initially starts registering as painful. Your muscles also learn to brace against expected pain, layering muscle tension on top of whatever the original problem was.
This is why many people with long-standing painful sex end up with more than one contributing factor. Someone who started with a yeast infection may develop pelvic floor tightening as a protective response, and that tightening persists long after the infection clears. Addressing pain early, before these layers build up, leads to faster and simpler treatment. But even if you’ve been dealing with this for years, each layer can be treated individually and the cycle can be broken.