What is the likely cause and appropriate work‑up and treatment for a woman with a six‑month history of continuous, odorless vaginal discharge that stops during menses and is associated with itching?

Continuous Vaginal Discharge with Itching (No Odor)

This presentation is most consistent with vulvovaginal candidiasis (VVC), and you should initiate treatment with topical azole antifungals for 7 days or oral fluconazole 150 mg as a single dose after confirming the diagnosis with vaginal pH testing and microscopy.

Clinical Reasoning

The key diagnostic features here strongly point toward VVC:

• Pruritus (itching) is the hallmark symptom of vulvovaginal candidiasis and is the most specific complaint for this condition 1
• Absence of odor effectively rules out bacterial vaginosis (which has a fishy odor) and trichomoniasis (which typically has malodor) 2, 3
• Discharge that stops during menses is consistent with VVC, as the pattern differs from bacterial vaginosis or trichomoniasis which tend to be more continuous 2
• The 6-month duration suggests this may be recurrent VVC rather than a single episode 1

Diagnostic Work-Up

Before treating, confirm the diagnosis with office-based testing:

• Measure vaginal pH: VVC is associated with pH ≤4.5, while bacterial vaginosis and trichomoniasis show pH >4.5 1, 2
• Perform wet mount microscopy with 10% KOH: Look for yeasts or pseudohyphae, which confirm Candida infection 1
• Consider yeast culture if symptoms persist after treatment or if non-albicans species are suspected, as this represents complicated VVC requiring different management 1

Common pitfall: Symptoms alone cannot reliably distinguish between causes of vaginitis—microscopy is essential 4. Self-diagnosis of yeast vaginitis is unreliable and leads to overuse of antifungals 1.

Treatment Approach

For Uncomplicated VVC (First Episode or Infrequent Recurrences)

Topical azole therapy (any of the following) 1:

• Clotrimazole 1% cream 5g intravaginally for 7 days, OR
• Clotrimazole 100 mg vaginal tablet for 7 days, OR
• Miconazole 2% cream 5g intravaginally for 7 days, OR
• Terconazole 0.4% cream 5g intravaginally for 7 days

Alternative oral therapy 1:

• Fluconazole 150 mg orally as a single dose

Expected outcome: Relief of symptoms within 48-72 hours and mycological cure in 4-7 days 1. Treatment with azoles achieves 80-90% cure rates 1

For Complicated/Recurrent VVC (Given 6-Month Duration)

Since this patient has had continuous symptoms for 6 months, this likely represents recurrent VVC, which requires:

• Extended initial therapy: 7-14 days of topical azole therapy rather than short-course treatment 1
• Maintenance suppression therapy for 6 months after achieving initial cure 1:
  • Fluconazole 150 mg orally every week, OR
  • Daily topical azole therapy

Important consideration: After controlling any precipitating factors (diabetes, recent antibiotic use, immunosuppression), induction therapy should be followed by maintenance regimen 1

Key Caveats

• If symptoms persist after 7-10 days or worsen, re-evaluate with repeat microscopy and consider culture to identify non-albicans species 2
• Non-albicans Candida (especially C. glabrata) may not respond to standard azole therapy and may require boric acid 600 mg intravaginally daily for 14 days 1
• Avoid empiric treatment without confirmation: 42% of women with vaginitis symptoms receive inappropriate treatment when diagnosed clinically without microscopy 5
• VVC can occur concomitantly with STDs, so if risk factors are present, test for other pathogens 1