What is it?
Pityriasis rosea is an eruptive disease which cause still remains controversial. The clinical features of the disease, the highest number of cases in certain seasons (especially autumn), immune alterations and viral DNA findings in affected patients suggest a relationship with some viral disease, a hypothesis not yet confirmed.
More common in women than in men, the disease has spontaneous cure in about 2-4 months and only rarely may reappear in the same patient. Patients do not need to withdraw from daily activities, as pityriasis rosea is not considered contagious.
Characteristics and symptoms
Initially, there is a primary lesion, oval, about 1 to 2 inches in size, which precedes the onset of a rash for a few days.
The subsequent eruption affects mainly the trunk and the root of the members, being rare in the extremities and face. It is composed of oval patches of pinkish color with scaling on the inside edges. The scales can be noticed by stretching the skin.
The intensity and number of lesions varies greatly (from few to many) and an important feature is the distribution of the lesions on the trunk, following the direction of the ribs, acquiring, with the spine, a look of pine tree. Usually there is no significant symptoms, but itching may be present in some cases.
Pityriasis Rosea heals spontaneously, but some treatments can be used to shorten the duration of the disease especially in more severe cases or those accompanied by itching, like antihistamine drugs and topical corticosteroids, which should be indicated by a dermatologist.
- Pityriasis rubra pilaris
- Pityriasis versicolor