In pityriasis rosea – colloquially known as rose lichen – (synonyms: Gibert’s disease; rose lichen (pityriasis rosea); ICD-10 L42: pityriasis rosea) is a harmless, noncontagious inflammatory skin disease. It manifests itself in the form of scaly, petty-shaped and reddened foci.
Seasonal frequency of the disease: floretsciasis occurs more frequently in spring and autumn.
Sex ratio: Women are more frequently affected than men.
Frequency peak: the disease usually occurs during puberty or in young adults, i.e. between the ages of 10 and 35.
The prevalence (disease frequency) is about 0.13% (in Germany).
Course and prognosis: The disease usually heals spontaneously (by itself) in six to eight weeks without consequences. However, it may recur (come back). However, the recurrence rate is only 2% at most.
