05.06.2021 – 13:50
Inflammatory skin disorder “pityriasis rosea” reaches its peak incidence during adolescence and adulthood.
It usually starts as a large pink rash on the chest or back (one to two inches in diameter). This is called a “warning plot” because it really is a warning of what is to come.
Within one to two weeks, the patient erupts into dozens, if not hundreds, of smaller light pink rashes. The body, arms, legs and neck can be affected, but rarely the face. Parents often confuse pityriasis rosea with worms, a fungal infection.
The cause of Pityriasis rosea is not known, but it is not a fungal infection and is therefore not helped by antifungal medications. One way to recognize the disorder is to examine the chest or back for the specific pattern of flat, oval or Christmas tree-shaped lesions.
Pityriasis rosea presents differently in some people, who tend to create raised spots on the face and limbs more than on the torso. The color usually changes: it turns brown instead of pink spots, and with a thick, granular center.
Symptoms that suggest you may have Pityriasis Rosea may include:
Large pink spot, usually on the torso, followed by:
Numerous small rashes
Slight fatigue
Slight itching
How is Pityriasis Rosea diagnosed?
Diagnosis is made by physical examination and complete medical history, plus KOH preparation, in which a small sample of tissue from one spot is shredded and examined under a microscope to rule out fungal infection.
How is Pityriasis Rosea treated?
Pityriasis rosea is non-contagious and poses no risk, usually passing within three to nine weeks. Expect new spots to explode during that time. Until the rash fades and disappears – leaving no marks, thankfully – the doctor will focus on controlling the symptoms. For example, lotions or antihistamines may be prescribed to relieve itching. Exposure to sunlight or ultraviolet light treatments is sometimes recommended to speed up the resolution of rashes.
What can teens do about this condition?
Young people with symptomatic pityriasis rosea may need to avoid strenuous physical activity, which can worsen existing rashes. Washing in lukewarm water, not hot water, is also recommended.
