Scalp Psoriasis vs Seborrheic Dermatitis: A Practical Guide
Two common inflammatory scalp conditions that look alike — how they differ, how they are treated, and their effect on hair.
FOLIGAIN Editorial Team · 10 min read · Updated 2026-09-28
How they differ
Both are chronic, both flare and settle, and both are very common.
| Scalp psoriasis | Seborrheic dermatitis | |
|---|---|---|
| Scale | Thick, silvery-white | Greasy, yellowish |
| Edges | Sharp, often beyond hairline | Diffuse |
| Other areas | Elbows, knees, nails | Eyebrows, nose folds, chest |
| Driver | Immune-mediated | Malassezia yeast + skin response |
| Typical treatment | Salicylic acid, coal tar, topical steroids, vitamin D analogues, systemic therapy | Ketoconazole, zinc pyrithione, selenium sulfide, mild topical steroids |
Effects on hair
Heavy scale, inflammation and scratching can cause shedding. In most cases this hair loss is temporary and improves once the scalp is controlled. Removing plaques forcefully can pull out hairs, so scale should be softened first with salicylic acid or oil-based treatments as directed.
Using hair-growth products alongside
Minoxidil and other leave-on products can sting on inflamed skin. Many dermatologists prefer getting the scalp condition under control first. Ask your clinician before combining treatments.
When to see a professional
This guide is educational. Persistent pain, bleeding, spreading redness, pus, scarring or patchy hair loss should be assessed by a dermatologist.
Frequently asked questions
Is scalp psoriasis contagious?
No. Neither psoriasis nor seborrheic dermatitis is contagious.
Will my hair grow back?
Shedding from inflammation usually recovers once the condition is controlled.
This content is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease. Speak with a qualified healthcare professional about your individual situation.
Individual results vary. Hair-growth products are used consistently over months, and outcomes depend on the cause and stage of hair loss.
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