Vaginismus: A Complete PLAB 2 Guide (With Causes Including Vulvodynia)

Ann Augustin
3 hours ago
3 min read

Vaginismus is a common but often misunderstood condition tested in PLAB 2, especially in communication stations involving dyspareunia or inability to have intercourse. A structured, empathetic approach is key to scoring well.

📌 What is Vaginismus?

Vaginismus is an involuntary contraction of pelvic floor muscles that makes vaginal penetration:

Painful
Difficult
Or impossible

👉 It is part of genito-pelvic pain/penetration disorder

Understanding the Word “-ismus” (High-Yield Insight)

The suffix “-ismus” (often heard as “-smus”) comes from Greek and generally means:

👉 “a condition or state, often involving abnormal muscle contraction or function”

🔍 Examples:

Trismus → jaw muscle spasm
Vaginismus → pelvic floor muscle spasm
Tenesmus → abnormal sensation of rectal urgency
Strabismus → abnormal eye alignment

👉 Key takeaway:Not all “-ismus” conditions are pure spasms, but many involve abnormal muscle activity or control

🧑‍⚕️ Presentation

🔑 Core Features:

Inability to have intercourse
Pain on attempted penetration
Difficulty inserting tampon/speculum
Fear or anxiety about penetration

💬 Typical statement:

“I’ve never been able to have sex”

⏳ Types (High-Yield)

🔹 Primary Vaginismus

Present from first sexual attempt
Never able to tolerate penetration

🔹 Secondary Vaginismus

Develops after previously normal intercourse
Usually triggered by pain or trauma

Causes of Vaginismus

👉 Think: Psychological + Physical triggers

Psychological Causes (Most common)

Fear of pain
Anxiety
Strict cultural/religious beliefs
Past sexual trauma
Poor sex education

Physical Causes / Triggers

🔥 Vulvodynia (Important)

Chronic vulval burning pain
Leads to pain → fear → muscle spasm cycle
Common cause of secondary vaginismus

Other Physical Causes:

Recurrent infections (e.g., candidiasis)
Painful intercourse in the past
Endometriosis
Vaginal atrophy
Postpartum trauma / episiotomy

👉 Important: Often no structural abnormality

Key Mechanism (Exam Gold)

👉 Pain → Fear → Spasm → More Pain

This cycle explains:

Why symptoms persist
Why reassurance + therapy are essential

Examination

🚨 Golden Rule: Never force examination

Approach:

Take consent
Offer chaperone
Stop if patient is uncomfortable

Findings:

Difficulty tolerating exam
Reflex pelvic muscle tightening
Usually normal anatomy

Investigations (UK Practice)

👉 Diagnosis is clinical

Only to exclude causes:

Vaginal swab (infection)
STI screening (if indicated)
Urinalysis
UPT (in case for ectopics)

❌ No routine imaging

Management (NICE-style Approach)

1. Education & Reassurance

“This is common and treatable”
Break fear–pain cycle

2. Pelvic Floor Physiotherapy

Relaxation techniques
Biofeedback

3. Vaginal Dilators (Key Step)

Gradual desensitisation
Done at patient’s pace

4. Psychosexual Therapy (Mainstay)

Address anxiety / trauma
Improve confidence and coping

5. Treat Underlying Causes

Antifungals → infections
Topical oestrogen → atrophy
Neuropathic meds → if vulvodynia present

6. Partner Involvement

Encourage communication
Reduce performance pressure

Complications

Relationship difficulties
Psychological distress
Infertility (due to inability to have intercourse)
Avoidance of healthcare (e.g., smear tests)

Follow-Up (UK)

Regular GP review
Monitor progress with therapy
Refer if needed:
- Psychosexual services
- Gynaecology
- Sexual health clinic

Red Flags (Do Not Miss)

Postmenopausal bleeding
Abnormal discharge
Vulval lesions
Unexplained weight loss

👉 Requires urgent referral

PLAB 2 Communication Pearls

“The pain is real and recognised”
“You are in control”
“We will go at your pace”
“We can stop anytime”

Quick Differentiation

Feature	Vaginismus	Vulvodynia
Core issue	Cannot insert	Burning pain
Onset	Often from first attempt	Gradual
Mechanism	Muscle spasm	Neuropathic pain
Relationship	Can be caused by vulvodynia	May trigger vaginismus

Final Takeaway

👉 Vaginismus = inability to tolerate penetration due to involuntary muscle spasm

👉 The suffix “-ismus” itself hints at an abnormal functional state, often involving muscle activity

👉 Often triggered by psychological factors or painful conditions like vulvodynia

✔ Common

✔ Real

✔ Treatable with a multidisciplinary approach