I just finished a diflucan (fluconazole) regimen for tinea versicolor how do i know if there still is an infection or not in the hypopigmented lesions ?

Time will tell: The hypo pigmented areas may persist for 6 wks or even up to eight weeks. It's important to remember that recurrence rates are also fairly high...Up to 80% within two years....So close follow up with your doctor and discussion about a prophylactic therapy choice may be in order.

Tinea Versicolor: Your doctor can diagnose tinea versicolor by what the rash looks like. Occasionally, the doctor may use ultraviolet light, which will make the affected areas appear a fluorescent yellow-green if they're the result of tinea versicolor. Your doctor may also take a skin sample by scraping some skin and scales from the affected area to look at under a microscope.