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What Is Pityriasis Lichenoides Chronica & How Long Does It Last?
Written by Medicover Team and Medically Reviewed by Dr Divya Manchala , Dermatologist
Pityriasis Lichenoides Chronica (PLC) is also known as a chronic form of pityriasis lichenoides. It is a rare, long-term inflammatory skin condition that causes red-brown, scaly papules on the skin.
This condition primarily affects the skin's surface and may persist for months or years. Early diagnosis and treatment help control symptoms and prevent discomfort or complications.
Key Features of Pityriasis Lichenoides Chronica
- Gradual onset of red-brown papules that may develop scaling
- Lesions often appear in crops and may fade slowly over time
- Commonly found on the trunk, buttocks, arms, and legs
- Usually mild itching, but sometimes asymptomatic
- Skin discoloration may persist after lesion resolution
What are the Pityriasis Lichenoides Chronica Symptoms and Warning Signs?
Recognising symptoms of PLC early can help with faster relief and better skin management. The skin changes can be gradual and persistent, and may mimic those of other skin diseases.
Common Symptoms of PLC
- Small, red or brown raised spots on the skin
- Scaly or flaky texture on the spots
- Itching or mild irritation
- Spots often appear on the chest, back, arms, legs, or buttocks
Severe Symptoms of PLC
- Spots that become crusty or thick
- Skin discoloration that lingers after the rash fades
- Rash that spreads or lasts for months without improving
If the skin rash does not improve with basic care or continues for weeks, consult a dermatologist to rule out serious skin disorders.
Eczema vs Pityriasis Lichenoides Chronica (PLC): What's the Difference?
PLC and eczema can look similar, especially in the early stages. However, they are different skin conditions with different causes, patterns, and treatments.
| Feature | Eczema | Pityriasis Lichenoides Chronica (PLC) |
|---|---|---|
| Cause | Often linked to allergies, irritants, or genetics | Possible immune response, past infections |
| Appearance | Red, dry, itchy patches; may ooze or crack | Red-brown papules with scaling; appear in crops |
| Common Areas | Folds of elbows, knees, face, neck | Trunk, arms, legs, buttocks |
| Age Group | Common in babies, children, and adults | Common in older children and young adults |
| Itching | Usually intense | Usually mild or absent |
| Course | May flare with triggers like weather, soaps | Lesions come and go in cycles over months |
| Treatment | Moisturisers, steroids, antihistamines | Steroids, light therapy, antibiotics in some cases |
If you're unsure whether your rash is eczema or PLC, consult a dermatologist for accurate diagnosis and treatment.
What are the Different Types of Pityriasis Lichenoides Chronica?
Pityriasis lichenoides is mainly classified into two types:
- Pityriasis Lichenoides Chronica (PLC): This is the milder, long-lasting type. The rash develops slowly and usually causes less discomfort.
- Pityriasis Lichenoides et Varioliformis Acuta (PLEVA): This is the more severe, fast-developing type. It can cause painful, blister-like spots.
PLC tends to last longer but is usually easier to manage than PLEVA.
What are the Common Causes and Risk Factors of Pityriasis Lichenoides Chronica?
Though the exact cause of PLC is unknown, however experts believe it may be linked to problems with the immune system or past infections.
Pityriasis Lichenoides Chronica Causes
- Reaction from the immune system (possibly autoimmune)
- Viral or bacterial infections
- Inflammation triggered by an unknown substance in the body
Pityriasis Lichenoides Chronica Risk Factors
- It most often affects children and young adults
- Slightly more common in males
- May run in families or be linked to genetic factors
Tip: If someone in your family has a similar skin condition, early checkups can help with faster diagnosis and treatment.
Get a second opinion from trusted experts and makeconfident, informed decisions.
Get Second OpinionHow is Pityriasis Lichenoides Chronica Diagnosed?
Our diagnosing PLC starts with a skin check by a dermatologist. After that, we run tests to confirm the condition and rule out others.
Diagnostic Methods
- Clinical Examination: The doctor checks how long the rash has lasted and what it looks like.
- Skin Biopsy: A small skin sample is tested in the lab. This confirms PLC and shows signs like inflammation or scaling.
- Lab Tests: These help rule out other skin problems like psoriasis or lichen planus.
How Clinical Features Vary by Skin Type
- In darker skin tones, lesions may appear more hyperpigmented or violaceous
- Hypopigmentation or post-inflammatory discoloration is more common after healing
- Erythema (redness) may be less visible, which can delay diagnosis
- In lighter skin, scaling and redness are usually more noticeable early on
What are the Treatment Options for Pityriasis Lichenoides Chronica?
Although there is no permanent cure, PLC can be managed effectively with ongoing care and the right treatment strategy.
Medical Treatments
- Topical Steroids: These creams reduce itching and swelling.
- Calcineurin inhibitors: Used for sensitive areas or long-term control.
- Phototherapy: UVB light therapy helps with widespread rashes.
- Systemic Medications: In tough cases, antibiotics, retinoids, or immune-suppressing drugs may be used.
When to See a Doctor?
Don't ignore persistent skin rashes. PLC symptoms can be mistaken for eczema or psoriasis, delaying proper care.
Consult a doctor if
- Lesions persist longer than 2 weeks
- Symptoms worsen or spread
- Lesions cause significant discomfort or emotional distress
High-risk groups, such as children and those with a history of skin issues, should seek early dermatological evaluation.
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What is the Recovery Process After Pityriasis Lichenoides Chronica Treatment?
PLC improves slowly with steady care. Most patients see good results over time, but flare-ups may happen.
Post-treatment expectations
- Regular Checkups: To see how well the treatment is working
- Gentle Skin Care: Use soft cleansers and moisturisers
- Long-Term Results: Many people go into remission, but some may get flare-ups again
What Precautions Can Help Prevent Pityriasis Lichenoides Chronica?
Pityriasis Lichenoides Chronica Prevention
- Maintain healthy skin hygiene
- Manage stress, as it can trigger flare-ups
- Avoid harsh skin products or known allergens
- Strengthen immunity with balanced nutrition and rest
Pityriasis Lichenoides Chronica Complications
- Skin discoloration or scarring
- Secondary infections due to scratching
- Emotional distress or reduced self-esteem due to chronic skin appearance
Skin discoloration or scarring may be more visible depending on your skin tone. Early treatment helps reduce long-term pigment changes.
Our Experience Treating Pityriasis Lichenoides Chronica
Living with PLC can be tough, but you don't have to face it alone.
At Medicover Hospitals, we understand how long-term skin conditions can affect daily life. Our expert dermatologists use modern tools and customised treatment plans to offer effective relief.
We believe in complete care, not just treating the rash but also guiding you on skincare routines, emotional well-being, and prevention of future flare-ups.
