Vaginal pain has many possible causes, ranging from common infections to hormonal changes to muscle dysfunction. Around 16% of women experience chronic vulvar or vaginal pain lasting three to six months or longer, so this is far from rare. Pinpointing the cause matters because treatments vary widely depending on what’s behind the discomfort.
Infections That Cause Pain
Infections are one of the most frequent reasons for vaginal pain, and the type of infection changes what the pain feels like and what other symptoms show up alongside it.
Yeast infections, caused by an overgrowth of Candida fungus, are a classic culprit. They produce a thick, cottage cheese-like discharge along with itching, burning, and pain that often worsens after intercourse. Bacterial vaginosis (BV), by contrast, tends to cause irritation rather than outright pain. BV produces a thin, grayish discharge with a noticeable odor, especially after a period or sex. It develops when the natural balance of bacteria in the vagina shifts and protective bacteria lose ground to other organisms. Semen and menstrual blood both raise the vagina’s pH, which can trigger a flare.
Sexually transmitted infections like trichomoniasis, chlamydia, and gonorrhea can also cause vaginal pain, burning, or soreness. These sometimes mimic the symptoms of yeast infections or BV, which is why getting tested rather than self-treating matters, particularly if you have a new sexual partner or suspect your current partner may have one.
Hormonal Changes and Vaginal Atrophy
Estrogen plays a major role in keeping vaginal tissue thick, moist, and flexible. When estrogen drops, whether during menopause, breastfeeding, or after certain cancer treatments, the vaginal lining thins out and loses blood flow. The vaginal canal can actually narrow and shorten, and the body produces less natural lubrication. This collection of changes is called vaginal atrophy.
The first sign is often dryness noticed during sex, but the discomfort can extend well beyond that. Burning, itching, spotting, and pain with intercourse are all common. The tissue becomes so fragile that minor cuts can develop near the vaginal opening from routine activity. Even the labia can decrease in size over time. The thinning also shifts the acid balance inside the vagina, making infections more likely on top of the existing soreness.
Contact Irritation
Vulvar skin is more sensitive than skin elsewhere on your body, and it reacts easily to everyday products. Soaps, bubble baths, shower gels, talcum powder, cleansing wipes, feminine hygiene sprays, perfumes, deodorants, antiseptics, fragranced laundry detergents, and fabric softeners can all trigger burning, stinging, or a raw feeling. Panty liners are another common irritant that people rarely suspect.
Overwashing compounds the problem. Washing more than once a day strips natural moisture and disrupts the skin barrier, creating a cycle of dryness and irritation. If your pain started around the time you switched a product, that’s worth investigating before assuming something more complex is going on.
Pelvic Floor Muscle Problems
The muscles surrounding the vagina can become involuntarily tight or go into spasm, a condition called vaginismus. When this happens, the vagina effectively narrows, making penetration during sex painful or even impossible. Pelvic exams can trigger the same reaction. The spasms happen against your will, so you can’t simply relax through them.
Vaginismus can develop after a painful experience (childbirth, surgery, a rough exam), but it also arises without any obvious trigger. The pelvic floor muscles stay in a state of chronic tension, similar to how some people clench their jaw without realizing it. Pelvic floor physical therapy is the primary approach and has a strong track record for improving this type of pain over weeks to months.
Vulvodynia: Pain Without a Clear Cause
Some women experience persistent vulvar or vaginal pain with no identifiable infection, skin condition, or structural problem. This is vulvodynia, and it’s diagnosed after other causes have been ruled out. The workup typically includes a pelvic exam, a cotton swab test that maps exactly where the pain is located, cell samples to check for infection, and sometimes a blood test to evaluate hormone levels like estrogen, progesterone, and testosterone. If the vulvar skin looks unusual, a small tissue biopsy may be taken.
Vulvodynia pain can be constant or triggered by touch, sitting, or wearing fitted clothing. It often burns, stings, or feels raw. Because there’s no single identifiable cause, treatment usually involves a combination of approaches: topical treatments, pelvic floor therapy, nerve-targeting medications, and sometimes cognitive behavioral therapy for the pain response itself.
Endometriosis and Deep Pelvic Pain
When vaginal pain is felt deep inside during intercourse rather than at the vaginal opening, endometriosis is one of the more likely explanations. In endometriosis, tissue similar to the uterine lining grows outside the uterus. These patches produce their own estrogen locally, which fuels a cycle of inflammation. That inflammation activates pain receptors in the surrounding tissue.
In more advanced cases, called deep infiltrating endometriosis, the growths invade the lining of the pelvic cavity or nearby organs. Scar-like adhesions can form between the uterus and the bowel, pulling structures together in ways that make deep penetration particularly painful. This type of pain tends to be position-dependent and cyclical, often worsening around menstruation. Pelvic inflammatory disease, usually caused by untreated STIs, can produce similar deep pain through a different mechanism: infection spreading to the uterus, fallopian tubes, or surrounding tissue.
Pain After Childbirth
Vaginal delivery stretches and sometimes tears the tissue between the vagina and rectum. Soreness, swelling, and tenderness in the entire perineal area commonly last for weeks after birth. Sex can remain painful well into the postpartum period. Painful intercourse is recognized as a condition that may need treatment during the delayed postpartum phase, roughly six weeks to six months after delivery.
For most women the pain gradually resolves on its own, but scar tissue from tears or episiotomies can create a persistent tender spot. Breastfeeding also suppresses estrogen, which thins and dries vaginal tissue in the same way menopause does, compounding the discomfort. If pain during sex hasn’t improved by the six-month mark, pelvic floor therapy or further evaluation is reasonable.
Signs That Need Prompt Evaluation
Vaginal pain accompanied by fever or pelvic pain suggests an infection that may be spreading and warrants prompt attention. New or changed discharge in girls under 10, in postmenopausal women, or during pregnancy should be evaluated rather than watched. The same goes for pain that doesn’t resolve on its own within a couple of weeks, or any new symptoms after a change in sexual partners.