What causes pityriasis rosea?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)

The cause of pityriasis rosea is not altogether clear. Some medical professionals believe that the human herpesvirus 6 and 7 may play a role in the condition.


Pityriasis rosea is an itchy rash that starts on the torso. Currently there is nothing specifically known to cause pityriasis rosea. One thought is that a virus such as a variety of the human herpes virus may be a cause.

Continue Learning about Skin Disorders

Skin Disorders

Skin Disorders

Skin disorders affect people of all ages. Rashes, cysts, breakouts, redness and blisters all can be symptoms of conditions as varied as hives, rosacea, psoriasis, eczema and acne. Talk to your doctor or a dermatologist about any l...

asting symptoms to find the appropriate treatment. A doctor also can recommend the proper therapy for conditions like brown spots, spider veins, and fungal infections.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.