Pityriasis Alba - Symptoms, Causes & Treatment
Medically reviewed by Dr. Anand S. Urhekar, MD, MD Pathology, Clinical Advisor · Last updated July 2026
A mild variant of eczema that leaves round or oval pale, faintly scaly patches, most often on the cheeks, upper arms and trunk of children and teenagers. The patches become obvious after sun exposure because the surrounding skin tans while the affected areas do not. It is harmless and self-limiting.
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Quick Answer
Pityriasis alba is a mild form of eczema seen mostly in children aged 3–16. It produces round, pale, slightly dry and scaly patches on the cheeks, upper arms and trunk, which stand out most in summer. It is harmless, not a fungal infection and not contagious. Regular emollients, gentle cleansing, sun protection and short courses of mild topical steroid or a calcineurin inhibitor speed recovery; colour returns over months.
Symptoms
- Round or oval pale patches, 0.5–5 cm across
- Fine, powdery scale on the surface
- Poorly defined edges
- Most often on cheeks, upper arms, neck and trunk
- Mild or no itch
Causes & Risk Factors
- Underlying atopic tendency or eczema
- Dry skin and harsh soaps
- Sun exposure making the contrast obvious
- Common in children aged 3–16
Treatment & Management
- Regular emollients, applied at least twice daily
- Soap substitutes instead of foaming cleansers
- Short courses of mild topical corticosteroid (e.g. hydrocortisone 1%) for inflamed patches
- Topical calcineurin inhibitors for facial use over longer periods
- Daily sunscreen to reduce contrast
When to See a Doctor
See a doctor if the patches are spreading rapidly, becoming completely white, intensely itchy, ring-shaped with a raised scaly border (suggesting ringworm) or failing to improve after several months of emollients.
Frequently Asked Questions
Is pityriasis alba a fungal infection?
No. It is a mild eczema variant. Ringworm and tinea versicolor can look similar, which is why a doctor may scrape the skin to check before treating.
How long does pityriasis alba last?
Individual patches typically settle over several months, but new patches can appear for a year or more. Almost all cases resolve completely by adulthood with no lasting mark.
Is it contagious?
No. It cannot be passed to other children and does not require any school or sport restrictions.
Medical References
Information on this page is sourced from and verified against reputable medical resources:
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.