Hormonal birth control can cause pain during sex, and the link is more established than many people realize. Combined oral contraceptives, in particular, change the hormonal environment in ways that thin and dry vaginal tissue, sometimes producing a condition called vestibulodynia, a burning or stinging pain at the vaginal opening. Population studies have found that hormonal contraception use increases the risk of developing vulvodynia by anywhere from four to eleven times, depending on factors like age at first use and how long someone stays on the medication. Despite this, there is no routine screening for sexual pain before or after prescribing the pill, and the topic remains poorly discussed in most clinical visits.
What Hormonal Birth Control Does to Vaginal Tissue
Combined oral contraceptives work partly by delivering synthetic estrogen and progestin, which suppress your body’s own hormone production. One well-documented consequence is a sharp drop in testosterone. A systematic review and meta-analysis of studies in healthy women found that total testosterone dropped significantly during pill use, while free testosterone, the form your body can actually use, fell by an average of about 61%. At the same time, a protein called sex hormone-binding globulin (SHBG) rose substantially, further reducing the amount of active testosterone circulating in the blood.1PubMed. The effect of combined oral contraception on testosterone levels in healthy women: a systematic review and meta-analysis
That matters because estrogen and testosterone both play a direct role in keeping vaginal and vulvar tissue healthy. When levels of both hormones drop, blood flow to the vulva and vagina decreases, the tissue thins, and natural lubrication declines. The result is tissue that looks and behaves much like it does in menopause: drier, more fragile, and more prone to irritation during intercourse.2GREM Gynecological and Reproductive Endocrinology & Metabolism. Hormonal contraception and vulvodynia: an update – Section: Impact of hormonal contraception on sexual response This is not just a lubrication problem you can fix with over-the-counter products. When the tissue itself becomes atrophic, even well-lubricated contact can hurt because the nerve endings at the vaginal entrance become hypersensitive.
The Vulvodynia Connection
Vulvodynia is chronic vulvar pain without an identifiable cause like infection or skin disease. A subset, provoked vestibulodynia, refers specifically to pain triggered by touch or pressure at the vaginal opening, which is exactly what happens during penetrative sex. Several large population-based studies have found that hormonal contraception significantly increases the risk of developing vulvodynia, with estimates ranging from a four-fold to an eleven-fold increase in risk depending on the study and the specific risk factor examined, such as age at first use or duration of use.3GREM Gynecological and Reproductive Endocrinology & Metabolism. Hormonal contraception and vulvodynia: an update – Section: Sex hormones and vulvodynia
A systematic review of pelvic floor function found that current oral contraceptive use roughly doubled the odds of vulvar vestibulitis compared to non-users.4PubMed. Hormonal contraception and pelvic floor function: a systematic review That same review noted a link between ever having used oral contraceptives and interstitial cystitis, a bladder pain condition that often overlaps with vestibulodynia. The picture that emerges is of hormonal contraception affecting not just one spot, but the broader pelvic pain landscape.
Despite this body of evidence, there is currently no recommendation to screen for sexual function before or after starting combined oral contraceptives.5PubMed Central. Female sexual dysfunction with combined oral contraceptive use That gap in clinical practice means many women develop pain and never connect it to their contraception, sometimes enduring months or years of discomfort before someone asks the right questions.
Who Faces the Highest Risk
Not everyone on the pill develops pain, and researchers have been working to understand why some women are vulnerable while others are not. Three factors stand out: the age at which you start, the estrogen dose in your pill, and your genetics.
A population-based study found that oral contraceptive use was associated with about a 30% increase in vulvodynia risk overall, but that risk jumped sharply when women began using the pill before age 18, with about two and a half times the odds compared to non-users.6Journal of Reproductive Medicine. Influence of oral contraceptive use on the risk of adult-onset vulvodynia Adolescent vulvar tissue is still developing, and suppressing its hormonal supply during that window may cause changes that persist into adulthood. This is worth knowing, since many people start the pill in their mid-teens for menstrual regulation or acne, well before sexual activity begins and before anyone would think to screen for sexual pain.
Estrogen dose also matters. A study comparing women with vulvar vestibulitis syndrome to the general population found that about 79% of the affected women were using low-dose pills containing 20 micrograms of ethinyl estradiol or less, a rate far higher than what you would expect given that only about half the broader population was on low-dose formulations.7The Journal of Sexual Medicine. Vulvar Vestibulitis Syndrome and Estrogen Dose of Oral Contraceptive Pills Lower-dose pills deliver less estrogen to vulvar tissue, potentially starving it of the hormonal support it needs. The trend in prescribing over the past two decades has been toward these lower doses because they carry fewer cardiovascular risks, but the trade-off for vulvar health is rarely discussed.
Interestingly, one smaller study found that while women on 20-microgram pills had decreased free testosterone, they did not show measurable changes in clitoral or vestibular sensation on clinical testing.8The Journal of Sexual Medicine. Clitoral and Vulvar Vestibular Sensation in Women Taking 20 mcg Ethinyl Estradiol Combined Oral Contraceptives: A Preliminary Study This highlights how the relationship between hormones, tissue sensitivity, and pain is not a simple one-to-one ratio. Some women’s tissue compensates; others’ does not.
A Genetic Piece of the Puzzle
One reason some women develop pain on the exact same pill that causes no problems for others may come down to the androgen receptor gene. A study compared women who developed vestibulodynia while taking combined hormonal contraceptives with women who took the same type of contraceptive and had no pain. The women with pain were more likely to carry longer repeats of a specific sequence in their androgen receptor gene, a variation that makes the receptor less efficient at responding to testosterone. The researchers speculated that the combination of lower free testosterone from the pill and a receptor that does not work as well even under normal conditions creates a sort of double hit, leaving the vestibular tissue chronically underserved.9PubMed. Polymorphisms of the androgen receptor gene and hormonal contraceptive induced provoked vestibulodynia
This kind of genetic susceptibility is not something you would know about in advance, and no genetic test is routinely offered before prescribing birth control. But it does explain why blanket reassurances like “most women do fine on the pill” can feel dismissive to the ones who don’t. The pain is real, it has a biological basis, and for some women it may be partly hardwired in.
Other Contraceptive Methods and Pain
The pill is not the only contraceptive that can cause painful sex, but the picture varies a lot by method.
The depot medroxyprogesterone acetate injection, commonly known by its brand name, suppresses ovulation through a progestin-only mechanism. In doing so, it creates a low-estrogen state that can cause vaginal dryness and atrophy similar to what combined pills produce. Case reports document vaginal atrophy and pain during intercourse in long-term users of this injection.10PubMed Central. Vaginal Atrophy following Long-Term Depot Medroxyprogesterone Acetate Use: A Case Report Because the injection lasts about three months per dose, the hormonal suppression is continuous and not easily reversed. If pain develops, you cannot simply stop taking a daily pill; you have to wait for the drug to clear your system.
Hormonal intrauterine devices, which release a small amount of progestin directly into the uterus, appear to fare better. A systematic review found that hormonal IUDs had a positive impact on sexual pain and a neutral-to-positive effect on desire, with little impact on other aspects of sexual function like arousal or orgasm.11PubMed Central. The Effects of Hormonal and Non-Hormonal Intrauterine Devices on Female Sexual Function: A Systematic Review The likely explanation is that hormonal IUDs deliver their progestin locally, so systemic hormone levels are affected far less than with pills or injections. Your ovaries still produce estrogen and testosterone more or less normally.
Copper IUDs are hormone-free, so you might expect them to be neutral for sexual pain. The reality is more complicated. A study comparing copper IUD users to non-users found that the IUD group scored significantly worse on pain, and when multiple factors were analyzed together, copper IUD use was the strongest contributor to pain scores.12Taiwan Journal of Obstetrics and Gynecology. Comparative analysis of copper intrauterine device impact on female sexual dysfunction subtypes The pain with copper IUDs is probably not hormonal in origin. It more likely relates to heavier periods, cramping, or inflammation from the device itself. Still, it is worth knowing that “non-hormonal” does not automatically mean “pain-free.”
How Contraception Affects the Vaginal Microbiome
Pain during sex does not always trace directly to tissue thinning. The vaginal microbiome, the community of bacteria that keeps the vagina healthy, exists in a delicate balance. When that balance shifts away from its normal state, infections like bacterial vaginosis and yeast overgrowth become more likely, and both can make intercourse painful. Hormonal changes from contraceptives are one of the factors that can push the microbiome off balance.13PubMed Central. The impact of contraceptives on the vaginal microbiome in the non-pregnant state This adds another layer to the pain picture: even if your tissue is not visibly atrophic, a disrupted microbial environment can cause inflammation and irritation that shows up as burning or stinging during or after sex.
Broader Effects on Sexual Well-Being
Pain is rarely an isolated symptom. A study comparing women on hormonal contraceptives to women using non-hormonal methods found that the hormonal group reported lower satisfaction with sexual function, reduced arousal, and increased pain. They also had higher levels of anxiety and depression and reported poorer overall health.14The Journal of Sexual Medicine. Sexual function, quality of life, anxiety, and depression in women of reproductive age using hormonal, nonhormonal, and no contraceptive methods Whether the anxiety and mood changes drive the pain, or the pain drives the mood changes, or both stem from the hormonal shift, is hard to untangle. But it means that a woman experiencing painful sex on the pill is often dealing with more than just the physical sensation. The dread of anticipated pain can suppress arousal before anything even happens, which in turn worsens dryness and tissue tension, creating a self-reinforcing cycle.
Pelvic floor tension is part of this cycle too. When the body anticipates pain, the muscles around the vaginal opening tend to guard and tighten involuntarily. Over time, this guarding can become a habit that persists even after the original trigger is addressed. That is why some women continue to experience painful sex even after switching off a problematic contraceptive: the tissue may have recovered, but the muscles have learned to brace.
Getting a Diagnosis
One frustrating aspect of contraceptive-related sexual pain is that it can be hard to confirm clinically. The standard screening tool is a cotton swab test, where a clinician lightly touches specific points around the vaginal opening while the patient rates the discomfort. Research has found that this test correctly identifies about 72% of women with vulvodynia, but nearly 14% of women with confirmed vulvodynia show no increased sensitivity on the swab test at all.15PubMed Central. Does degree of vulvar sensitivity predict vulvodynia characteristics and prognosis? So a normal exam does not rule it out.
A refinement of this approach uses lidocaine, a numbing agent, to see whether the pain disappears when the tissue is anesthetized. If it does, that points to a mucosal (tissue-level) source of the pain rather than a deeper muscular or nerve problem.16Journal of Lower Genital Tract Disease. Comparing Vestibule Examination Techniques: Light Touch, Serial Forces, and the Lidocaine Test That distinction matters for treatment: tissue-level pain from hormonal changes responds to different interventions than pain driven by pelvic floor muscle spasm.
What Can Be Done About It
The first and most obvious step is to talk to your prescriber about the possibility that your contraception is causing the pain. Many clinicians are not in the habit of asking about sexual pain, and many patients assume the pain is just something they have to put up with. Simply naming the connection can open the door to a solution.
Switching to a different method is often the most effective move. Moving from a combined oral contraceptive to a hormonal IUD, for example, removes the systemic hormonal suppression while still providing reliable contraception. For some women, switching to a higher-estrogen pill or a different progestin formulation can help, though this is a trial-and-error process.
For women who have already developed vestibulodynia, stopping the pill alone may not be enough. The hormonal changes can persist because SHBG levels sometimes remain elevated for months after discontinuation, keeping free testosterone suppressed even without the pill. A small study of women with contraceptive-induced vestibulodynia found that topical treatment with estradiol and testosterone applied directly to the vestibule reduced pain scores from a median of 7.5 to 2 on a 10-point scale. SHBG levels also dropped substantially, and free testosterone levels roughly quadrupled during treatment.17PubMed Central. The Treatment of Vestibulodynia with Topical Estradiol and Testosterone This is a compounding pharmacy prescription, not something available over the counter, and it requires a clinician familiar with the condition.
Physical therapy is another avenue with growing evidence behind it. A meta-analysis of physical therapy for dyspareunia, the medical term for painful intercourse, found that pelvic floor muscle training, transcutaneous electrical nerve stimulation, manual trigger point release, and massage techniques all produced meaningful reductions in pain.18BMC Women’s Health. Effectiveness of physical therapy interventions in women with dyspareunia: a systematic review and meta-analysis Pelvic floor physical therapy is especially useful for the guarding pattern described earlier, where muscles have learned to tighten in anticipation of pain. A skilled therapist can help retrain those muscles to relax, which often resolves the pain that persisted after the hormonal issue was addressed.
Why This Problem Stays Under the Radar
Contraceptive-related sexual pain occupies an awkward space in medicine. Hormonal birth control is one of the most widely prescribed drug classes in the world, and its benefits for pregnancy prevention, menstrual regulation, and conditions like endometriosis are substantial. Clinicians are understandably cautious about discouraging its use. At the same time, the sexual side effects tend to be framed as uncommon or minor in prescribing literature, which does not match the experience of the women affected.
Part of the problem is that sexual pain is stigmatized. Many women grow up hearing that some discomfort during sex is normal, particularly during early sexual experiences, and that framing can delay recognition of a genuine problem. When a woman on the pill reports pain to her doctor, the response is often to suggest more lubricant or to look for infections, both of which can be appropriate first steps but miss the hormonal root cause. The absence of a routine screening protocol for sexual function before and after starting contraception means the burden falls on the patient to bring it up, often repeatedly, before the connection is made.
Research funding for vulvodynia has historically been low compared to other chronic pain conditions that affect similar numbers of people. The condition received its own dedicated research funding line from the National Institutes of Health only in the past two decades, and most of the mechanistic work linking hormonal contraception to vestibular pain has come from a relatively small number of research groups. This means the evidence base, while consistent in its direction, is thinner than it would be for a condition with decades of well-funded study behind it. Clinicians who did not encounter this literature in their training may simply not be aware of the link.
For women navigating this, the practical takeaway is that painful sex on birth control is not something to quietly endure. It has identifiable causes, and in most cases it can be treated, either by changing the contraceptive method, applying topical hormones, working with a pelvic floor therapist, or some combination of these. The first step is recognizing that the pain and the pill might be connected.