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Pityriasis Rosea

An acute skin disease that usually begins with a 'herald patch' and presents with a Christmas tree-patterned rash on the trunk.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dermatoloji department. Book Appointment →

What is Pityriasis Rosea?

Pityriasis rosea is a self-limiting acute skin disease whose etiology is attributed to reactivation of human herpes viruses HHV-6 and HHV-7. It is most commonly seen in young adults between 10-35 years of age; it shows an increase in spring and autumn.

The disease usually begins with a single large oval plaque (herald patch) on the trunk. Within days to weeks, smaller, oval, pinkish scaly lesions appear on the trunk with their long axes aligned with the Langer lines of the skin, forming a 'Christmas tree' pattern on the back.

The disease is not contagious and usually resolves spontaneously within 6-8 weeks. Itching is the most common complaint and can affect quality of life.

Symptoms

A single large oval plaque on the trunk (herald patch)
Multiple small pink scaly lesions within days to weeks
Arrangement of lesions along Langer lines (Christmas tree pattern)
Mild to moderate itching
'Collarette' scaling around the lesion
Back, chest, abdomen, and upper extremity involvement
Mild malaise and fever in some cases (in prodromal period)

Risk Factors

Young adult age (10-35 years)
Spring and autumn seasonal distribution
Viral upper respiratory tract infections (preceding)
Transient immune system modulation
Female gender (slightly increased)
Stress and fatigue
Some vaccines and drugs with similar rashes (drug-related PR)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • If the rash is very itchy and disrupting sleep
  • For lesions lasting longer than eight weeks
  • During pregnancy (may be risky in the early trimester)
  • When the rash may be confused with syphilis or eczema
  • For rashes spreading to the palms and soles

Treatment Methods

01
Usually no special treatment required; resolves spontaneously
02
Topical corticosteroids for itching
03
Oral antihistamines (sedating/non-sedating)
04
Sun or UVB phototherapy (in widespread cases)
05
Warm bath and moisturizer applications
06
Avoiding irritating soaps, hot showers, and woolen clothing

Which Department to Visit?

You can visit our Dermatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.