Pityriasis

Pityriasis (or tinea) is the first part of the name of a number of scaly skin conditions. These are usually not related to each other. There is more information and photos of pityriasis alba, pityriasis versicolor and pityriasis rosea at the bottom of this page. These are common variants.

Pityriasis Alba: Light and scaly patches usually localised on the face or upper body. Alba means 'white' and pityriasis alba is literally 'flaky white'. Pityriasis alba usually occurs in children and young adults and is more noticeable in summer due to sun exposure.

The cause is unknown, but it usually occurs with dry skin and eczema. It is important to keep the skin well hydrated with moisturisers and protect it from the sun.

Pityriasis Versicolor: Small spots that are lighter or darker in colour than one's own skin colour. We often see this variant on the trunk and shoulders. Versicolor means "multicoloured" and pityriasis versicolor is literally "scaly multicoloured".

The cause is a yeast called Malassezia, which disrupts pigmentation in the skin in conditions such as sweating, hot weather and a weakened immune system. Pityriasis versicolor can be treated with creams or shampoos containing ingredients such as selenium sulphide or ketoconazole. It is important to use breathable fabrics for clothing and shower regularly.

Pityriasis Rosea: Often 1 scaly red spot starts and eventually small, red patches appear around it. Usually localised on the upper body.

The cause is unknown, but may be due to a virus. Usually the spots are gone within 6 to 8 weeks, but sometimes they stay for 12 weeks. If the spots are very itchy, you can use cooling ointment. Sometimes this is not enough and the GP can give you a prescription for a cream. Furthermore, it is important to avoid excessive sun exposure.

As you read, there are many differences in pityriasis skin conditions. It is important to make an accurate diagnosis to determine the most effective treatment. When in doubt, always consult a dermatologist or GP.

Example photo Pityriasis Alba

Example photo Pityriasis Versicolor

Example photo Pityriasis Rosea