This could be a recurrence of the infection.Pityriasis rosea (PR) is a common, harmless human skin disease which presents as numerous patches of pink or red oval rash, mainly on the torso.
While no scarring has been found to be associated with the rash, itching and scratching should be avoided. Irritants such as soap should be avoided.
In cases of severe itching you could apply steroid ointment on the affected area.
No treatment is usually required. In most patients, the condition lasts only a matter of weeks; in some cases it can last longer (up to six months).
A doctor should be consulted, if only to rule out other conditions like eczema or psoriasis.