Painful Sex: Why It Happens and When to See a Doctor

Pain during sex isn't "all in your head," it won't "just go away," and it's not something you should endure for your partner's sake. According to gynecologists, a significant proportion of women and people with vulvas experience dyspareunia (the medical term for painful intercourse) at some point in their lives. International research on pelvic pain emphasizes that vulvodynia and endometriosis are among the most common — yet still underdiagnosed — causes of suffering in the intimate sphere[3].

Let's unpack why sex can be painful, what mechanisms lie behind it, and when it's time to see a doctor instead of hunting for "the right position" on TikTok.

What dyspareunia is and why it's so common

Dyspareunia is persistent or recurrent genital or pelvic pain associated with sexual activity. It can occur:

• at entry (superficial dyspareunia) — burning, stinging, or a cutting sensation at the vaginal opening;
• with deep penetration (deep dyspareunia) — a pulling, cramping pain low in the abdomen or pelvis;
• after sex — aching sensations that linger for hours or even days.

Important: painful sex is a symptom, not a diagnosis. There is always a specific cause behind it — inflammation, hormonal changes, neurological hypersensitivity, muscle spasm, endometriosis, psychological trauma, or a combination of these. Researchers at the University of Rochester emphasize that gynecological pelvic pain is a global public health issue, and endometriosis and vulvodynia share common biological mechanisms, including the role of TRPV1 pain receptors[3].

Main causes: from the vulvar skin to deep in the pelvis

1. Vulvodynia — when it "just hurts" and the doctor sees nothing

Vulvodynia is chronic pain in the vulvar area (burning, tingling, a "paper-cut" sensation) without any obvious infection or visible damage. A woman goes to the gynecologist, hears "everything looks fine" — and leaves feeling like she must be losing her mind. But the pain remains.

Current research shows that vulvodynia is linked to hypersensitivity of nerve endings, including altered function of TRPV1 receptors — the very ones that respond to "burning" stimuli. This mechanism is what connects vulvodynia to endometriosis and explains why pain can be triggered even by the lightest touch[3].

What's important to know:

• vulvodynia is a real diagnosis, not "psychosomatic";
• it responds to treatment: topical anesthetics, pelvic floor physical therapy, specific medications, and work with a sex therapist;
• diagnosis is usually made by exclusion — after ruling out infections, dermatoses, and atrophy.

2. Endometriosis — the "prime suspect" behind deep pain

If pain occurs with deep penetration, radiates to the lower back or rectum, worsens before menstruation, and is accompanied by painful periods — this is a reason to be evaluated for endometriosis. In this condition, tissue similar to the uterine lining grows outside the uterus: on the ovaries, peritoneum, and pelvic ligaments.

Dyspareunia is part of the classic triad of endometriosis symptoms alongside dysmenorrhea and infertility. Studies linking endometriosis and vulvodynia show that both conditions involve central sensitization — a state in which the nervous system "relearns" to interpret ordinary signals as painful ones[3]. That's why a single patient often ends up dealing with several types of pelvic pain at once.

3. Dryness and hormonal changes

Vaginal dryness is one of the most underappreciated causes of pain. It doesn't only happen in menopause:

• when taking combined oral contraceptives;
• during breastfeeding;
• while on antihistamines or antidepressants (especially SSRIs);
• during chemotherapy and radiation;
• when arousal is insufficient and there's too quick a jump to penetration.

In menopause and perimenopause, estrogen levels drop — the mucosa becomes thinner, less elastic, and more easily injured. This condition is called genitourinary syndrome of menopause and responds well to treatment with local estrogens and moisturizers.

4. Pelvic floor muscle hypertonicity

The pelvic floor muscles form a hammock that supports the pelvic organs. Normally, they can both contract and relax. But in many people these muscles are in a state of chronic spasm — due to stress, anxiety, the habit of "sucking in" the belly, the aftereffects of trauma, or long-standing pain.

Signs of hypertonicity:

• feeling a "wall" when attempting penetration;
• pain from a tampon or a speculum;
• frequent urge to urinate, constipation;
• pain in the tailbone or lower back after sex.

Addressing this condition is the job of a pelvic floor physical therapist. Kegel exercises won't help here (and often make things worse): what's needed are relaxation techniques, breathing work, gentle manual therapy, and sometimes vaginal dilators used under a specialist's guidance.

5. Vaginismus

Vaginismus is the involuntary contraction of vaginal muscles when penetration is attempted. The body literally "closes up," even when the person consciously wants sex. Vaginismus is often connected to early negative experiences, fear of pain, or beliefs about sex being "dirty," but it can also occur without any obvious cause.

The good news: vaginismus is one of the most successfully treatable sexual disorders. A combination of psychotherapy, somatic work, and gradual desensitization brings results for the majority of patients.

6. Infections and inflammation

Yeast infections, bacterial vaginosis, STIs, cystitis, and pelvic inflammatory disease can all cause sharp or dragging pain. Diagnosis here is straightforward: swabs, PCR, ultrasound. This is the first thing a doctor should rule out.

7. Psychological causes: not "in your head" but "from the mind into the body"

Anxiety, depression, unprocessed trauma, conflict in the relationship, feelings of unsafety — all of this affects arousal, lubrication, and muscle tone. This doesn't mean the pain is "made up." It means that mind and body are a single system.

Research from the Gottman Institute on long-term relationships shows that the quality of emotional connection and a couple's ability to talk about difficult things directly affect sexual satisfaction and how partners cope with physical challenges[1]. Couples who can discuss pain without blame more often find solutions — both medical and relational[2].

When to see a doctor: don't "tough it out" — go

International gynecological societies, including ACOG (the American College of Obstetricians and Gynecologists), agree: any persistent pain during sex warrants a consultation. Not "if it gets worse," not "it'll pass after childbirth," but now.

See a doctor if:

• the pain recurs more than 2–3 times in a row;
• you're avoiding sex out of fear of pain;
• the pain is accompanied by bleeding, discharge, or fever;
• there are painful periods, pain outside of sex, or pain when urinating or having a bowel movement;
• the pain appeared after childbirth, surgery, or menopause and isn't going away;
• you're experiencing emotional distress, anxiety, or decreased libido because of the pain.

Who to see:

1. Gynecologist — your first point of contact. Ideally one who specializes in pelvic pain or sexual medicine.
2. Pelvic floor physical therapist — if a muscular component is suspected.
3. Sex therapist or psychotherapist — for vaginismus, post-traumatic responses, or couple conflicts.
4. Dermatologist/vulvar specialist — if lichen sclerosus or other vulvar dermatoses are suspected.

How to talk to your doctor (and your partner)

Many women live with pain for years because they're embarrassed or have been dismissed: "Just relax," "Have a glass of wine," "It's normal." It's not normal.

What helps at the appointment:

• write down in advance: where it hurts, how long, under what circumstances, what makes it worse and what helps;
• use specific words: "burning," "stinging," "spasm," "deep pulling pain";
• say it plainly: "I want to find the cause, not just be told to put up with it";
• if a doctor dismisses you, you have every right to switch doctors.

The conversation with your partner is a separate task. Research shows that a live voice conversation gives far more understanding and less conflict than messaging in a chat — and this applies to all difficult topics, including intimate ones[6]. Don't discuss pain in bed right after a failed attempt: choose a neutral time and place, speak in the first person ("it hurts," "I'm scared," "I need…") rather than framing it as a complaint.

What you can do on your own — meanwhile and alongside treatment

Self-help doesn't replace a doctor, but it makes life easier:

• Water- or silicone-based lubricants. Not "for those who can't get wet," but for comfort. Anyone can use them, anytime.
• More time for foreplay. Physiologically, a woman needs on average 20+ minutes to become fully aroused and lubricated.
• A warm bath before sex. Relaxes the pelvic floor muscles.
• Breathing practices. A slow exhale activates the parasympathetic nervous system and reduces muscle tone.
• Positions where you control depth and pace. For example, riding on top or side-lying.
• A pause. Giving yourself permission not to have penetrative sex while you're in treatment isn't "giving up on intimacy" — it's caring for it.

The bottom line

Painful sex is a signal — not a life sentence and not "a woman's lot." There is always a physiological, neurological, hormonal, or psychological reason behind it, one that can be identified and worked with. Modern medicine knows far more about vulvodynia, endometriosis, and pelvic floor hypertonicity than it did ten years ago[3], and most patients can significantly improve both their quality of life and their sex lives.

You're not "broken." You're not "too sensitive." Your body is sending a signal — and it deserves to be heard. By you, and by your partner.

FAQ

Can painful sex resolve on its own?

A one-off episode linked to insufficient arousal, fatigue, or stress may indeed not repeat. But if pain shows up regularly, it usually doesn't go away by itself: there's a specific cause behind it — from dryness and infection to endometriosis or pelvic floor hypertonicity. The longer you tough it out, the more entrenched the 'sex = pain' reflex becomes, and the harder it is to untangle later.

How can I tell vulvodynia from an infection?

Infections usually come with discharge, odor, itching, sometimes fever, and are clearly visible on lab tests. Vulvodynia is persistent burning or stinging at the vaginal opening despite no visible inflammation and 'clean' test results. An accurate diagnosis is made by a gynecologist through exclusion, which is why it's important not to keep self-treating 'a yeast infection' for years and instead get to a pelvic pain specialist.

Do Kegel exercises help with painful sex?

Not always — and often the opposite. If the pain is caused by pelvic floor muscle hypertonicity (a very common situation), Kegels will only intensify the spasm. In these cases you need relaxation techniques, breathing practices, and work with a pelvic floor physical therapist. Before you 'strengthen' those muscles, it's worth understanding what state they're actually in.

How do I talk to my partner about the fact that it hurts?

Pick a neutral time outside the bedroom and speak in the first person: 'it hurts,' 'I'm scared,' 'it matters to me that we understand what's going on.' A live voice conversation works better than texting: research shows that spoken communication brings more understanding and less conflict when it comes to difficult topics. Emphasize that this isn't about your partner or a lack of desire — it's about your health — and propose a joint plan of action.

Which doctor should I see first?

Start with a gynecologist, ideally one with experience in pelvic pain or sexual medicine. They'll rule out infections, assess the mucosa, order an ultrasound, and if needed refer you to a pelvic floor physical therapist, a vulvar specialist, or a sex therapist. If your doctor dismisses your complaints and tells you to 'relax' or 'have a glass of wine' — that's a good reason to find another specialist.

Sources

1. Thirty Years Later — The Gottman Institute
2. Love on a Tuesday Afternoon — The Gottman Institute
3. Pelvic Pain and Endometriosis - Research Projects - Falsetta Lab - URochester Medicine — University of Rochester Medical Center
4. Where To Look For Joy | Greater Good — Greater Good (Berkeley)
5. The Ups and Downs of Communal Living — Greater Good (Berkeley)
6. Is Talking or Texting Better for Disagreements? — Greater Good (Berkeley)
7. How Can We Make Relationships the Heart of Schools? — Greater Good (Berkeley)
8. How to Create a Future Where Everyone Belongs — Greater Good (Berkeley)