Dandruff and Seborrheic Dermatitis: Why Does It Keep Coming Back?
Dandruff can be part of seborrheic dermatitis, a relapsing condition. Long-term control is different from treating one flare.
Scalp · 7 min read · August 22, 2026
More than a dry scalp
Seborrheic dermatitis can cause greasy or dry scale with itch and redness. It may involve the scalp, sides of the nose, eyebrows and areas behind the ears.
Why antifungal shampoos are often used
Malassezia yeast contributes to many cases of seborrheic dermatitis, which is why antifungal shampoos are commonly included in treatment. Frequency and application vary by severity and body site.
Treatment does not end when the scale disappears
The condition tends to relapse. After control is achieved, a lower-frequency maintenance plan may be useful instead of waiting for a full flare every time.
When to consider another diagnosis
- Very thick plaques and heavy scale may raise the possibility of psoriasis.
- Localized hair loss or significant pain needs broader assessment.
- Failure to respond to an appropriate plan may require reconsidering the diagnosis.
Medical references
Medical review
This guide was written and medically reviewed by Dr. Yousef Abo Zarad, a German board-certified specialist in Dermatology and Venereology.