Seborrheic Dermatitis of the Scalp

What Is It?

Seborrheic dermatitis is a common, long-term skin condition that causes flaking, redness, and itching on the scalp. In its mildest form, most people simply know it as dandruff. It tends to come and go over time, with flare-ups followed by periods when skin looks and feels normal.

Signs & Symptoms

• White or yellowish flakes in the hair or on the shoulders

• A red, greasy, or oily-looking scalp

• Itching, sometimes mild burning

• Patches of scale that can feel thick in some spots

• Worse in cold, dry weather or during stress

Tips for Managing It at Home

• Leave medicated shampoo on scalp 3–5 minutes before rinsing (follow product label)

• Avoid scratching, which can irritate skin further and raise infection risk

• Try to manage stress — flares are often linked to stressful periods

• Use a soft brush or comb, and avoid very hot water

• Be patient — it can take several weeks to see clear improvement

When to Call Your Provider

• No improvement after 6–8 weeks of consistent treatment

• Scalp becomes very painful, swollen, or oozes fluid (possible infection)

• You notice NEW hair thinning or hair loss

• The rash spreads to your face, ears, or chest