Disclaimer: This is general health information only and is not a substitute for advice from your GP or healthcare professional.
1. What is Christmas tree rash?
Christmas tree rash, also called pityriasis rosea, is a common, mild skin condition that causes pink or red patches on the trunk and back. The pattern often resembles the shape of a Christmas tree, which gives it its name.
2. What causes Christmas tree rash?
The exact cause is unknown, but it is thought to be linked to viral infections, possibly human herpesvirus 6 or 7. It is not considered contagious. Stress or seasonal changes may trigger flare-ups in some people.
3. What are the symptoms?
- Starts with a single “herald” patch (a larger, oval, scaly spot)
- Followed by smaller patches spreading on the trunk, back, or upper arms
- Mild itching, which may be more noticeable at night
- Rarely affects the face, palms, or soles
- Usually develops over 1–2 weeks and resolves on its own
4. How is Christmas tree rash diagnosed?
Diagnosis is usually clinical, based on:
- Characteristic pattern of the rash
- Presence of the initial herald patch
- Excluding other conditions such as fungal infections, eczema, or secondary syphilis
Laboratory tests are rarely needed.
5. How is it treated?
Treatment is mainly supportive, as the rash usually resolves within 6–8 weeks:
- Moisturising creams for dryness or irritation
- Oral antihistamines for itching
- Topical corticosteroid creams for moderate itching
- Avoiding harsh soaps or irritants
6. How long does it last?
Most cases clear within 6–8 weeks without treatment. Rarely, it may persist longer, but it typically resolves without scarring.
7. Is Christmas tree rash contagious?
No. It is not contagious and cannot be spread through casual contact, clothing, or bedding.
8. Can children get it?
Yes, although it is more common in adolescents and young adults. Children usually have milder symptoms.
9. When should I see a doctor?
See a doctor if:
- The rash is widespread, severe, or painful
- There is significant itching that affects sleep or daily life
- You are unsure whether it is pityriasis rosea or another condition
- Signs of infection or systemic illness develop
10. Can Christmas tree rash cause serious health problems?
No. It is usually mild and self-limiting. Complications are rare, and the rash typically resolves without scarring or long-term issues.
