What causes pityriasis versicolor?

The condition, also called tinea versicolor, often affects the chest, back, shoulders, or neck. Patches may be lighter, darker, or pinker than surrounding skin and can have fine scaling, especially when gently scratched. Warm, humid conditions, sweating, oily skin, and a tendency for the yeast to overgrow can make it more noticeable. It is not the same as poor hygiene and it is not generally spread by ordinary contact. The altered colour can remain visible after the yeast has been controlled because pigment recovery takes time.

A clinician can confirm the diagnosis when patches are changing, widespread, or uncertain. Treatment may use an antifungal applied to the affected skin, a medicated wash or shampoo, or oral medicine in selected situations. Follow the prescribed contact time and repeat plan; stopping early can leave active yeast behind. Keep sweaty skin dry, change out of damp clothing, and avoid harsh scrubbing. Read about [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) or [Medicated Shampoo Treatment](/treatments/medical-dermatology/medicated-shampoo-therapy/).

Arrange an assessment if the rash is painful, very itchy, oozing, rapidly spreading, or associated with fever. Seek review when patches do not improve after appropriate treatment, recur frequently, or involve the face or a child. A clinician may distinguish it from eczema, vitiligo, or another cause of [White Patches On Skin](/symptoms/white-patches-on-skin/).

Does the colour and scale fit tinea versicolor? Which treatment suits the area involved, and how long should it remain on the skin? When should the colour return, and how can recurrences be managed?