Q:

What is pityriasis?

A:

Quick Answer

Pityriasis, or pityriasis rosea, is a skin problem that results in a rash, according to WebMD. The condition generally affects people between the ages of 10 to 35, but it can occur at any age.

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Full Answer

Although the specific cause of pityriasis is unknown, it may be caused by a virus, notes WebMD. The condition is not contagious, nor is it caused by an allergic reaction, fungus or bacteria. Symptoms include single, scaly, round or oval pink patches with raised borders; salmon-colored oval patches on the abdomen, chest, back, arms and legs; and mild itching. The condition typically lasts from six to eight weeks, but may linger for up to several months.

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