Well-bordered plaques may indicate more than ordinary dandruff
Psoriasis may involve thick adherent scales, extend beyond the hairline and accompany nail or joint findings.
Several explanations may be worth exploring
- Scalp psoriasisThick plaques and extra-scalp findings can point to psoriatic inflammation.
- SebopsoriasisFeatures of psoriasis and seborrheic dermatitis may overlap.
- Seborrheic dermatitisYeast-associated inflammation may cause recurring greasy scale.
- Scarring alopeciaSome inflammatory hair-loss disorders need early dermatologic assessment.
- Allergic contact dermatitisHair dyes, fragrances and preservatives can trigger scalp inflammation.