While no scarring has been found to be associated with the rash, scratching should be avoided. Its possible that scratching can make itching worse and an itch-scratch cycle may develop with regular scratching (that is, you itch more because you scratch, so you scratch more because you itch, and so on). Irritants such as soaps with fragrances, hot water, wool, and synthetic fabrics should be avoided. Lotions that help stop or prevent itching may be helpful.Direct sunlight makes the lesions resolve more quickly. According to this principle, medical treatment with ultraviolet light has been used to hasten resolution, though studies disagree whether it decreases itching or not. UV therapy is most beneficial in the first week of the eruption.A 2007 meta-analysis concluded that there is insufficient evidence for the effectiveness of most treatments. Oral erythromycin was found to be effective for treating the rash and relieving the itch based on one early trial; however, a later study could not confirm these results. Prognosis
In most patients, the condition lasts only a matter of weeks; in some cases it can last longer (up to six months). The disease resolves completely without long-term effects. In a ten-year epidemiological study of 939 people in the United States, less than two percent had a recurrence. Epidemiology
The overall prevalence of PR in the United States has been estimated to be 0.13% in men and 0.14% in women. It most commonly occurs between the ages of 10 and 35.
It is more common in spring.PR is not viewed as contagious, though there have been reports of small epidemics in fraternity houses and military bases, schools and gyms. See also
Pityriasis circinata - a localized form of pityriasis rosea that affects the axillae and groin
Pityriasis - for list of similarly named flaky skin conditions
List of cutaneous conditions

References
External links

DermNet viral/pityriasis-roseaAmerican Academy of Dermatology - Pityriasis Rosea
American Osteopathic College of Dermatology