Pityriasis versicolor and hypopigmentation

The yeast associated with pityriasis versicolor can affect pigment production in nearby skin. This creates lighter macules that may be more noticeable after surrounding skin tans. Fine scale can support the diagnosis, although it may be subtle. Hypopigmentation does not automatically mean the pigment cells have been permanently damaged. Other causes of pale or white patches exist, including inflammatory and pigment conditions, so the pattern, scale, symptoms, and course all matter during an examination.

Use the antifungal treatment recommended for your skin and the affected site. A topical antifungal treatment is often considered for limited areas; a clinician may instead discuss medicated shampoo treatment or oral antifungal treatment when the distribution or response calls for it. Do not scrub or bleach the patches. Moisturiser can reduce irritation, and sun protection helps prevent surrounding skin from becoming more contrasted. Track whether new scaly patches appear separately from old, smooth pale areas.

Arrange a dermatology review if colour loss is sharply white, expanding despite treatment, completely smooth, associated with hair changes, or accompanied by pain or inflammation. Seek prompt care for swelling near the eyes, blistering, or a rapidly changing facial rash. Reassessment is also sensible when the diagnosis was never confirmed or the expected scale and pattern are absent.

Is the lighter colour consistent with post-infectious pigment change or active pityriasis versicolor? Should the area be tested? Which treatment is suitable for my location, and what signs show that it is working?