What causes vulvodynia?

What causes vulvodynia?

Overview

Vulvodynia is long-lasting pain or discomfort in the vulva, the external genital area around the opening of the vagina. It is not simply ordinary soreness after sex or a brief irritation after using a new product. NHS guidance defines it as vulval pain lasting at least three months where a specific cause has not been found. The pain can be distressing because the skin may look unchanged even when the burning, stinging or raw feeling is intense.

This article is classified as sexual_health with medical-condition depth because it explains a chronic vulval pain condition, how symptoms can present, how clinicians assess it, and how management is usually planned. It is written to match the practical completeness of the Mayo Clinic vulvodynia condition page while keeping UK care pathways central.

What is known about causes

Vulvodynia does not have one proven cause. It is better understood as a chronic pain condition with several possible contributors. These may include over-sensitive vulval nerves, previous vaginal infections, inflammation, allergies or irritant sensitivity, hormonal changes, and pelvic floor muscles that have become tense or poorly coordinated. In many people, the final picture is a combination rather than a single trigger.

This matters because treatment should be based on assessment. If a clinician finds active thrush, herpes, bacterial vaginosis, eczema, lichen sclerosus or genitourinary syndrome of menopause, treating that condition may reduce pain. If no active condition explains the symptoms, management often shifts towards calming nerve pain, reducing irritation and rehabilitating the pelvic floor.

How vulvodynia can feel

People describe vulvodynia in different ways: burning, stinging, stabbing, throbbing, soreness, rawness, irritation or a sharp knife-like pain. The pain may affect one small area, commonly the vestibule around the vaginal opening, or it may involve a wider part of the vulva. It may be provoked by touch, such as sex, a pelvic examination, inserting a tampon or wearing tight clothing, or it may be present without any obvious trigger.

Symptoms can also affect the urethral area, inner thighs or skin around the anus. Some people notice flares after sitting for a long time, cycling, bowel movements, stress, hormonal shifts or repeated irritation. The visible appearance of the vulva is often normal, which is one reason people may feel dismissed. Normal-looking skin does not mean the pain is not real.

Possible causes and mechanisms

The exact cause is often not known, and more than one mechanism may be involved. Current clinical explanations include oversensitive or irritated vulval nerves, previous vaginal infections, inflammation, allergies or irritant reactions, hormonal changes such as lower oestrogen, and pelvic floor muscles that have become tight, weak or difficult to relax. These mechanisms can reinforce each other: pain can make the pelvic floor guard, guarding can increase pressure on sensitive tissues, and repeated pain can make nerves more reactive.

Vulvodynia is diagnosed only after other causes have been considered. Thrush, bacterial vaginosis, herpes, other sexually transmitted infections, lichen sclerosus, lichen planus, eczema, psoriasis, genitourinary syndrome of menopause, painful scars, pudendal neuralgia and vulval growths can all cause vulval symptoms. Repeated self-treatment for presumed thrush can sometimes add irritation if thrush is not actually present.

Stress and anxiety can worsen pain perception, sleep and muscle guarding, but they should not be presented as the sole cause without evidence. Similarly, past infections or hormonal changes may be relevant for some people but do not explain every case. Good care avoids both extremes: it neither dismisses pain as psychological nor promises that one trigger explains everyone’s symptoms.

Assessment and diagnosis

A GP, sexual health clinician or gynaecologist will usually ask when the pain started, where it is felt, what triggers it, whether there is itching, discharge, bleeding, urinary pain, bowel pain or pain during sex, and what treatments have already been tried. They may ask about skin conditions, infections, menopause, contraception, childbirth, pelvic surgery, trauma, stress, medications and the effect on sleep, relationships and daily life.

Examination is normally gentle and consent-based. A clinician may look at the vulval skin, take swabs to exclude infection, and use a cotton bud to map which areas are painful. This is not to prove the pain is psychological; it helps distinguish localised vestibular pain from wider vulval pain and guides treatment. If symptoms are complex, referral to a vulval clinic, gynaecologist, dermatologist, pelvic floor physiotherapist, pain specialist or psychosexual therapist may be appropriate.

Treatment and support options

The aim of treatment is to reduce pain, improve function and address any treatable contributors. No single option works for everyone. Depending on assessment, options may include vulval skin care, stopping irritants, topical numbing medicines, tablets used for nerve pain, pelvic floor physiotherapy, vaginal trainers, psychological therapies such as CBT, psychosexual therapy, and support for pain during sex. Surgery to remove a painful vestibular area is considered only occasionally, usually for selected localised pain when other approaches have not helped.

Pelvic floor physiotherapy can be particularly relevant when pain is linked with muscle tightening, difficulty inserting tampons, pain with penetration or urinary and bowel tension. Psychological support does not mean the pain is imagined. Chronic pain affects the nervous system, sleep, stress response and relationships; support can help reduce fear, avoidance and flare cycles while medical causes continue to be addressed.

Self-care and daily adjustments

Self-care should support medical assessment, not replace it. NHS advice includes wearing loose cotton underwear, using pads instead of tampons if tampons trigger pain, using lubricant during sex, avoiding douching, avoiding hot baths, and choosing unperfumed products or an emollient after advice from a GP or pharmacist. Some people find cool compresses helpful during flares. Avoid scrubbing the vulva; the vagina cleans itself internally.

It can help to keep a brief symptom diary noting pain location, severity, menstrual cycle stage, sex, new products, clothing, sitting time, infections, bowel symptoms, stress and treatments used. The purpose is not to blame daily behaviour for the condition, but to give clinicians clearer information and identify avoidable irritants.

When to seek medical advice

See a GP or sexual health clinic if vulval pain does not go away, keeps coming back, makes sex or tampon use difficult, or affects sleep, concentration, mood or relationships. Seek advice sooner if pain is severe, new after possible STI exposure, associated with sores, blisters, a lump, bleeding, fever, pelvic pain, pregnancy, unusual discharge, pain when passing urine, or symptoms after assault or safeguarding concerns.

If pain becomes overwhelming, if you cannot pass urine, if there is heavy bleeding, spreading infection symptoms, or a life-threatening emergency, use NHS 111 for urgent advice or call 999. You can ask to see a female clinician and request a chaperone or trusted support person during an examination.

Sources

• NHS, Vulvodynia (vulval pain): https://www.nhs.uk/conditions/vulvodynia/
  Relevance: UK patient guidance on symptoms, assessment, treatment options, self-care and when to see a GP for persistent vulval pain.
• Mayo Clinic, Vulvodynia symptoms and causes: mayoclinic.org guidance page link unavailable during validation (mayoclinic.org guidance page, link unavailable during validation)
  Relevance: Mayo Clinic condition coverage used as a completeness benchmark for symptoms, possible causes, complications and when to seek medical care.
• Mayo Clinic, Vulvodynia diagnosis and treatment: mayoclinic.org guidance page link unavailable during validation (mayoclinic.org guidance page, link unavailable during validation)
  Relevance: Supports the article’s explanation of clinical examination, tests used to exclude other causes, medicines, pelvic floor therapy and multidisciplinary care.
• ACOG Committee Opinion, Persistent Vulvar Pain: https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2016/09/persistent-vulvar-pain
  Relevance: Professional guidance supporting careful history, cotton-swab pain mapping, infection exclusion and individualised treatment planning.

Disclaimer

Educational only. Results vary. Not a cure. Use NHS 111 for urgent advice or call 999 in a life-threatening emergency.