I have pityriasis rosea, does anyone know any treatment?

Usually don't need: Pr would go away spontaneously without treatment, probably 6~8 weeks later. Sometimes, topical cortisone cream, prescription-strengthed, may help to speed up the healing.

No need: You don't need treatment. Just apply moisturizer of any kind and wait for 6~8 weeks. It would fade away.

Time: Treatments for pityriasis rosea (pr) can help ease symptoms or shorten the duration. For example steroids creams & ointments can help ease itching and decrease redness. Itching can also be reduced with the use of antihistamines. The duration of pr may also be shortened by one to two weeks by taking antiviral drugs such as Acyclovir (zovirax). However, pr usually resolves on its own (2-4 wks).