Pain during intercourse is common, and it almost always has a physical explanation. The causes range from something as simple as insufficient lubrication to underlying conditions like infections, hormonal changes, or pelvic floor problems. Understanding where and when the pain happens is the single most useful clue for figuring out what’s going on.
Where the Pain Occurs Matters
Pain during sex generally falls into two categories, and the distinction points toward very different causes.
Entry pain (sometimes called superficial dyspareunia) is felt at the vaginal opening during initial penetration. It’s typically linked to dryness, irritation, infection, hormonal changes, or injury to the skin around the vaginal entrance. This is the more common type and often the easier one to address.
Deep pain happens further inside the pelvis during thrusting and tends to feel worse in certain positions. Conditions affecting the bladder, bowel, pelvic floor, or reproductive organs are usually responsible. Endometriosis is one of the most well-known causes, but it’s far from the only one.
Dryness and Insufficient Lubrication
This is the most straightforward cause and one of the most frequent. Without enough natural lubrication, friction against the vaginal walls creates a burning or stinging sensation. Stress, certain medications (especially antihistamines and some antidepressants), not enough time spent on foreplay, and hormonal shifts can all reduce lubrication. A water-based or silicone-based lubricant often resolves the problem entirely when dryness is the only issue.
Hormonal Changes and Vaginal Atrophy
When estrogen levels drop, the vaginal tissue becomes thinner, drier, less elastic, and more fragile. This happens most dramatically during and after menopause, but it can also occur during breastfeeding, after certain cancer treatments, or with some hormonal contraceptives. The acid balance inside the vagina also shifts, making infections more likely on top of the discomfort.
This condition, called genitourinary syndrome of menopause, tends to get worse over time without treatment. Many people notice pain during sex along with light bleeding afterward. Vaginal moisturizers used regularly (not just during sex) help maintain tissue health, and topical estrogen therapy can reverse much of the thinning for those who are candidates.
Infections That Cause Inflammation
Active infections make vaginal tissue swollen, irritated, and sensitive to touch, which turns penetration painful. The most common culprits are yeast infections, bacterial vaginosis, and sexually transmitted infections like trichomoniasis or chlamydia.
Yeast infections cause a burning feeling during intercourse and urination, along with redness, swelling, and often a thick white discharge. The fungus Candida albicans is responsible for most cases. Bacterial vaginosis produces a different kind of irritation, usually with a thin grayish discharge and a fishy odor. Both are treatable, and the pain during sex resolves once the infection clears. If pain appeared suddenly alongside unusual discharge, odor, or itching, an infection is a likely explanation.
Pelvic Floor Muscle Tightness
The pelvic floor is a group of muscles that wraps around the vaginal canal. When these muscles involuntarily tighten or spasm during penetration, the result can range from mild discomfort to sharp pain that makes sex feel impossible. This is called vaginismus, and the key feature is that the tightening happens automatically. You can’t control it.
The main theory behind vaginismus is that a fear or expectation of pain triggers the pelvic floor to clench protectively. This creates a self-reinforcing cycle: anticipating pain causes tightening, tightening causes pain, and pain reinforces the fear. The spasms can be triggered by any kind of vaginal penetration, including tampon use or gynecological exams, not just intercourse. Pelvic floor physical therapy, which involves learning to identify and consciously relax these muscles, is one of the most effective treatments. A 2024 systematic review found that multimodal physical therapy for chronic pelvic pain in women was effective with a high level of evidence.
Vulvodynia and Nerve Sensitivity
Some people experience chronic burning, stinging, or rawness at the vaginal opening with no visible cause. This is vulvodynia, defined as vulvar pain lasting three or more months that isn’t explained by an infection, skin condition, or other identifiable problem. The pain is often localized to the vestibule, the ring of tissue just inside the vaginal lips surrounding the vaginal and urethral openings.
Researchers suspect nerve injury or an increase in nerve density in the affected tissue plays a role, though the exact mechanism isn’t fully understood. What makes vulvodynia frustrating is that everything looks normal on examination. The pain is real, but standard tests won’t reveal a cause. Treatment typically involves a combination of pelvic floor therapy, topical medications to calm nerve sensitivity, and sometimes cognitive behavioral therapy to address the pain cycle.
Endometriosis and Deep Pelvic Pain
Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus, often on the ligaments that support it. The uterosacral ligaments, thick bands of connective tissue running from the base of the uterus to the lower spine, are the most commonly affected site, involved in an estimated 20 to 70 percent of deep endometriosis cases. Nodules that form on these ligaments get pressed and stretched during deep penetration, causing a distinct aching or stabbing pain.
This kind of pain tends to be position-dependent. Certain angles push against the affected tissue more than others, so some positions may feel fine while others are intensely painful. The pain often correlates with menstrual cycles, worsening around your period. If deep pain during sex consistently accompanies painful periods and pelvic pain at other times, endometriosis is worth investigating with a gynecologist.
Pain During Intercourse in Men
Though less commonly discussed, men experience painful intercourse too. Prostatitis, an inflammation of the prostate gland, can cause pain during or after ejaculation. It often results from a bacterial infection, and in some cases from a sexually transmitted infection. The pain can range from a dull ache to a sharp burning sensation.
Tight foreskin (phimosis) makes penetration painful because the skin can’t retract fully, creating tension and sometimes small tears. Peyronie’s disease, where scar tissue inside the penis causes it to curve abnormally, can make erections and penetration uncomfortable or painful. Skin infections of the penis head (balanitis) cause redness and soreness that worsen with friction. Like vaginal pain, pain during sex in men has treatable causes and isn’t something to simply push through.
What Helps and What to Expect
The right approach depends entirely on the cause, which is why identifying the type and location of pain matters so much. For dryness, lubricants and extended foreplay are the first step. For hormonal changes, vaginal moisturizers and estrogen therapy address the underlying tissue changes. Infections require appropriate medication, after which the pain typically resolves within days to weeks.
Pelvic floor dysfunction and vaginismus respond well to specialized physical therapy. A pelvic floor therapist works with you on muscle awareness, relaxation techniques, and gradual desensitization using dilators of increasing size. This process takes weeks to months, but the evidence supporting it is strong. For conditions like endometriosis, treatment ranges from hormonal management to reduce the growth of tissue, to surgical removal of nodules in more severe cases.
Pain during sex that appeared suddenly after previously comfortable intercourse often points to an infection, injury, or new medication. Pain that has been present since your first sexual experience is more likely related to pelvic floor tension, anatomical factors, or vulvodynia. Pain that worsens over months or years suggests a progressive condition like endometriosis or hormonal changes. Each of these timelines narrows the list of likely causes and helps guide the conversation with a healthcare provider.