Chronic Vaginal Itching After Intercourse
The most likely diagnosis is vulvovaginal candidiasis (VVC), and you should obtain a vaginal culture (gold standard) or molecular assay to confirm the diagnosis before initiating treatment with azole antifungals 1.
Diagnostic Approach
Initial Testing
- Obtain vaginal culture - this remains the gold standard for diagnosis of VVC 1
- Newer molecular assays perform well and can be used as alternatives 1
- Microscopy has limitations but can provide immediate information if typical findings are present 2
- Measure vaginal pH (normal pH <4.5 suggests candidiasis; elevated pH suggests bacterial vaginosis or trichomoniasis) 2
Key Clinical Features to Assess
- Itching is the most specific symptom for VVC 1
- Absence of itching makes candidiasis less likely (likelihood ratio 0.18-0.79) 2
- Look for inflammatory signs on examination (erythema, edema, fissures) - these are associated with candidiasis (likelihood ratio 2.1-8.4) 2
- Assess for "cottage cheese" discharge, though this is not always present
- Ask about odor: lack of odor favors candidiasis (likelihood ratio 2.9), while presence of odor suggests bacterial vaginosis 2
Critical pitfall: Symptoms and physical examination alone cannot reliably distinguish between causes of vaginitis 2. Microscopy and culture are essential for accurate diagnosis.
Management Based on Diagnosis
For Confirmed Uncomplicated VVC
First-line treatment options 1:
- Intravaginal azoles: Clotrimazole 1% cream 5g daily for 7-14 days, OR clotrimazole 2% cream 5g daily for 3 days, OR miconazole 2% cream 5g daily for 7 days
- Oral azole: Fluconazole (single dose, typically 150mg)
For Recurrent VVC (≥4 episodes per year)
- Consider longer induction therapy followed by maintenance suppressive therapy 1
- Oteseconazole may represent a new option when commercially available 1
- Ensure accurate diagnosis with culture, as recurrent symptoms may indicate non-albicans species
For Non-Albicans Yeast Infections
- Boric acid appears useful in symptomatic patients with non-albicans species 1
- This is particularly important if symptoms persist despite standard azole therapy
Additional Considerations
Differential Diagnosis Beyond Infection
If cultures are negative or treatment fails, consider 3, 4, 5:
- Lichen sclerosus - requires high-potency topical corticosteroids
- Vulvar eczema/dermatitis - may be triggered by irritants (soaps, lubricants, condoms, semen)
- Atrophic vaginitis - especially in perimenopausal/postmenopausal women
- Vulvar intraepithelial neoplasia (VIN) - must be considered in refractory cases 5
- Contact dermatitis from products used during or after intercourse
Eliminate Contributing Factors
- Discontinue potential irritants: scented products, douches, harsh soaps
- Consider allergy to latex condoms, lubricants, or seminal fluid
- Implement consistent moisturizing care with bland emollients 5
- Address hormonal factors if relevant
When to Refer or Biopsy
- Symptoms persisting despite appropriate antifungal therapy
- Atypical appearance on examination
- Any concern for dysplasia or malignancy 5
Important caveat: The temporal relationship with intercourse suggests either infectious transmission (though VVC is not considered sexually transmitted), mechanical irritation, contact allergy, or exacerbation of underlying inflammatory conditions. If candidiasis is ruled out, focus on contact allergens and inflammatory dermatoses.
Do not use probiotics - there is no evidence supporting their use for VVC treatment or prevention 1.