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HealthInfo Canterbury


There are two common forms of pityriasis, and they both affect your skin.

Pityriasis rosea

This is a harmless rash that can last for two to three months. It causes oval red patches, mainly on your chest, abdomen (tummy) and back. It's probably caused by a virus, but that's not certain. You can read more about pityriasis rosea on DermNet NZ.

Pityriasis versicolor

This is a common yeast infection of the skin, which causes flaky, discoloured patches on your chest and back. You can find out more about pityriasis versicolor on DermNet NZ.

Written by HealthInfo clinical advisers. Last reviewed April 2019.

See also:

Fungal skin infections

Page reference: 186338

Review key: HIRWM-49695