Pityriasis Lichenoides Chronica: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Pityriasis Lichenoides Chronica?
A dermatologist treats this condition because it is rare and can look like other diseases. A primary care doctor can start by examining the rash and making a referral. A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor charges more and often works alongside insurance.
What is pityriasis lichenoides chronica?
Pityriasis lichenoides chronica is a rare skin condition. It causes small, scaly bumps and patches, usually on the arms, legs, and body. It tends to last for months or years and often comes and goes. A skin doctor called a dermatologist usually diagnoses and treats it.
Pityriasis lichenoides chronica is the long-lasting, milder form of a skin disease called pityriasis lichenoides. It is a rare inflammatory skin disease, meaning the immune system reacts in the skin. It is not contagious.
Symptoms
The main sign is a rash of small bumps or patches, often brownish, reddish, or darker than the surrounding skin. It usually appears on the arms, legs, and trunk and rarely itches. Spots appear slowly over weeks or months. A sudden, severe version with fever can be a more serious form needing quick medical care.
Causes and who gets it
Doctors do not know exactly what causes this condition. Many think it happens when the immune system overreacts, possibly after an infection. It is not contagious and can appear at almost any age, though it is seen more often in children and young adults.
How doctors diagnose it
A dermatologist usually starts by looking at the skin and asking questions. Because the rash can look like eczema or psoriasis, doctors often need more information. The most common test is a skin biopsy, in which a small piece of skin is examined under a microscope to confirm the diagnosis.
Treatment
Treatment aims to calm the rash and ease symptoms, but there is no single cure. Mild cases are often treated with topical corticosteroids. Light therapy uses controlled doses of ultraviolet light. Some people take antibiotics, which seem to help even without an infection. Severe cases may need medicines that work on the immune system.
When to see a doctor
Anyone with a rash lasting more than a few weeks should see a doctor, as should anyone whose spots change, bleed, or look unusual. A sudden rash with fever needs care right away.
Common questions
Is pityriasis lichenoides chronica dangerous?
For most people, it is mainly a skin problem and not a threat to overall health. The rash can last a long time and may come back, which can be frustrating. A dermatologist can monitor the skin and adjust treatment as needed.
Is it contagious?
No. The rash cannot spread to other people through skin contact. Family members and classmates do not need to worry about catching it.
Will the rash leave scars?
The spots usually fade over time, though the skin may look slightly lighter or darker where they were. Deep scars are not typical. Protecting the skin and following the treatment plan may help the skin look more even as it heals.
Can it go away on its own?
Sometimes the rash fades without treatment, but this can take months or years. Other people need ongoing treatment to keep it under control. Results differ from person to person, so a dermatologist can give a better idea of what to expect.
Sources
- NIH Genetic and Rare Diseases Information Center - Acute lichenoid pityriasis
- MedlinePlus - Skin Conditions
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
