Vaginal pain has many possible causes, ranging from common infections and irritation to chronic conditions involving nerves or muscles. Chronic pelvic pain affects an estimated 14.7% of women in the United States, and the underlying reason can be straightforward or surprisingly hard to pin down. Understanding the most likely causes helps you recognize what might be going on and what to do about it.
Infections
Vaginal infections are among the most frequent causes of pain, burning, and general discomfort. The three most common types each feel a bit different.
Bacterial vaginosis (BV) is the most common vaginal infection in women ages 15 to 44. It sometimes causes no symptoms at all. When it does, you may notice a thin white or gray discharge and a strong fishy odor, especially after sex. BV itself can cause irritation and soreness, though it’s less intensely painful than other infections.
Yeast infections produce a thick, white, cottage cheese-like discharge that typically has no smell. The hallmark symptom is intense itching and redness of the vagina and vulva, which can progress to raw, burning pain if the tissue becomes inflamed.
Trichomoniasis is a sexually transmitted infection that causes itching, burning, and soreness of the vagina and vulva. You may also have a gray-green discharge with an unpleasant odor and burning during urination. Like BV, trichomoniasis can be present without any noticeable symptoms.
Irritation From Everyday Products
Contact irritation is an overlooked but extremely common source of vaginal and vulvar pain. The skin in this area is thinner and more sensitive than skin elsewhere on the body, so it reacts to chemicals that wouldn’t bother your hands or legs. Products that frequently trigger irritation include soap, bubble bath, shampoo, perfume, douches, laundry detergent, scented pads or panty liners, spermicides, and even certain toilet papers. Synthetic underwear fabrics like nylon can also be a factor.
The resulting inflammation, called vulvar dermatitis, causes stinging, burning, and rawness that can easily be mistaken for an infection. Switching to fragrance-free products and wearing cotton underwear often resolves it within days to a couple of weeks.
Hormonal Changes and Vaginal Dryness
Estrogen plays a major role in keeping vaginal tissue thick, elastic, and naturally lubricated. When estrogen levels drop, particularly during and after menopause, the vaginal lining becomes thinner, drier, and more fragile. This condition, sometimes called vaginal atrophy, makes everyday activities and sex uncomfortable or outright painful. The shift in the vagina’s natural acid balance also makes infections more likely, compounding the problem.
Hormonal changes during breastfeeding and certain cancer treatments can cause the same effect in younger women. The discomfort tends to be a persistent dryness and soreness rather than sharp pain, and it usually responds well to topical estrogen or non-hormonal moisturizers.
Pelvic Floor Muscle Tension
The pelvic floor is a group of muscles that supports the bladder, uterus, and rectum. When these muscles go into a state of constant contraction, a condition called hypertonic pelvic floor, they can’t relax enough to allow comfortable penetration, tampon use, or even sitting for long periods. The result is pain during or after sex, a deep aching sensation, and sometimes difficulty urinating.
This involuntary tightening can develop after trauma, surgery, chronic stress, or repeated infections. It can also appear without an obvious trigger. The muscles essentially get “stuck” in a guarded position. Physical therapy focused on the pelvic floor is the primary treatment, and many people see significant improvement within a few months of consistent work.
Vulvodynia: Chronic Pain Without a Clear Cause
Vulvodynia is chronic vulvar pain that persists for three months or longer with no identifiable infection, skin condition, or injury to explain it. It’s a diagnosis of exclusion, meaning doctors arrive at it after ruling out everything else. The pain can be generalized (spread across the entire vulvar area) or localized to a specific spot, often the vaginal opening. It can be constant, come and go, or appear only when the area is touched or pressed.
Diagnosis typically involves a cotton swab test, where a provider gently presses different areas to map where pain occurs and how severe it is. Infections are ruled out through lab testing, and a musculoskeletal evaluation checks for pelvic floor dysfunction that might be contributing. Treatment usually combines topical medications, pelvic floor therapy, and sometimes nerve-targeting approaches. It’s not fully understood why vulvodynia develops, but it’s a real, recognized condition, not something imagined.
Nerve Damage or Compression
The pudendal nerve runs through the pelvis and supplies sensation to the vulva, vagina, and surrounding area. When this nerve is damaged, compressed, or irritated, the result is pudendal neuralgia: stabbing, burning, or shooting pain in the pelvic region. The pain often worsens with sitting and improves when standing or lying down.
Pudendal neuralgia can develop after childbirth, pelvic surgery, prolonged cycling, or for no obvious reason. Diagnosis involves a physical exam where a provider presses directly on the nerve through the vaginal or rectal wall, and sometimes imaging or nerve conduction testing. A key diagnostic step is a nerve block injection: if numbing the pudendal nerve eliminates the pain, that confirms it as the source.
Physical Trauma and Childbirth
Vaginal tears during childbirth are common and range from minor surface-level tears that heal on their own to deeper lacerations requiring stitches. Up to 83% of women report sexual problems in the first three months after delivery, and 18% to 30% still experience pain during sex at the six-month mark. Most minor tears heal within a few weeks, but deeper injuries can cause lingering tenderness for months.
Outside of childbirth, vaginal pain from physical causes includes micro-tears from sex without adequate lubrication, injury from foreign objects, or trauma from accidents. These typically heal relatively quickly, but repeated micro-trauma can lead to chronic sensitivity if the tissue doesn’t get a chance to fully recover between episodes.
Less Common but Treatable Causes
Several other conditions can cause vaginal pain that’s worth knowing about. Genital herpes causes painful blisters or sores during outbreaks. Inflammatory skin conditions like lichen sclerosus thin and scar the vulvar skin, causing chronic soreness. Vulvar growths, including cysts near the vaginal opening (Bartholin’s cysts), can become swollen and intensely painful if they get infected. Endometriosis, where tissue similar to the uterine lining grows outside the uterus, often causes deep pain during sex along with pelvic pain at other times.
Each of these has specific treatments, and all are diagnosable through a standard gynecologic exam. The overlap in symptoms between many of these conditions is exactly why persistent or unexplained vaginal pain is worth getting evaluated rather than guessing at the cause.