Pityriasis rosea

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Pityriasis rosea is a rash that can occur at any age, but it occurs most commonly in people between the ages of 10 and 35 years.

It may be set off by a viral infection but does not appear to be contagious; herpes viruses 6 and 7 have most often been associated with pityriasis rosea. It is not caused by a fungus. It is not related to foods, medicines, or stress. It most often affects teenagers or young adults.

The condition often begins as a large single pink patch on the chest or back. This patch may be scaly and is called a 'herald' or 'mother' patch. Within a week or two, more pink patches, sometimes hundreds of them, appear on the body and on the arms and legs. Patches may also occur on the neck, and though rare, the face. The oval patches follow the line of the ribs like a fir tree. They have a dry surface and may have an inner circlet of scaling.


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