Pityriasis rosea

Pityriasis rosea: a strange rash that can be worrying but resolves on its own

What is pityriasis rosea?

One of the most common forms of dermatitis, pityriasis rosea is recognisable for its very characteristic exanthem. It affects the majority of people at some stage, most commonly between the ages of ten and 35.

Where does pityriasis rosea occur?

Pityriasis rosea mainly occurs on the trunk and can sometimes affect the limbs. It rarely appears on the face, hands or feet.

What does pityriasis rosea look like?

Pityriasis rosea begins with the appearance of a round or oval-shaped patch. It is noticeable for its slightly scaly border and reddened center. This primary patch is called the “herald patch,” from which other, smaller patches will form in the days that follow.

Does pityriasis rosea cause itching?

While the rash does not cause particular discomfort, some may feel slight itchiness where the patches form.

After the patches fade

After the patches have faded, the skin returns to normal.

Can pityriasis rosea recur?

As a rule of thumb, pityriasis rosea occurs just once. However, in some individuals, it may recur several times even years apart.

Is pityriasis rosea contagious?

Oddly, pityriasis rosea is not contagious.

What are the causes of pityriasis rosea and how long does it last?

Until recently, the cause of pityriasis rosea was not known; however it has now been established that it is linked to the herpes virus, specifically herpesvirus types 6 and 7.
From when the first patch appears to complete regression, a period of up to six months may pass.

Precautions, treatment and recommendations

Those with pityriasis rosea can lead completely normal lives: they can eat their regular diet, work and socialize.
As there are no changes in blood parameters during the rash phase, no further examinations are necessary, and the dermatitis will eventually resolve spontaneously without the need for medication.

DermaClub recommends…

While the rash is present, the skin is particularly sensitive. Therefore, instead of washing with generic soaps, use Eudermic Cleansing Base and avoid direct sun or UV lamp exposure. In addition, do not use potentially irritant fabric such as wools or synthetics. If itching occurs, use Soothing Cream.