Dandruff vs. Dry Scalp: Key Differences, Causes & Treatments

Though both cause flaking and itching, dandruff and dry scalp have distinct causes and treatments.

Dandruff (Seborrheic Dermatitis)

• Cause: Overgrowth of Malassezia yeast, which feeds on scalp oils, triggering inflammation and rapid skin cell turnover.
• Signs: Large, oily, yellowish flakes; red, greasy scalp; itching.
• Triggers: Stress, hormonal changes, cold/dry weather, certain hair products.
• Treatment: Medicated shampoos with zinc pyrithione, selenium sulfide, ketoconazole, or coal tar. Use 2–3 times weekly.

Dry Scalp

• Cause: Lack of moisture due to cold weather, low humidity, harsh shampoos, aging, or skin conditions like eczema.
• Signs: Small, white, dry flakes; tight, itchy scalp; possibly dry skin elsewhere.
• Treatment: Gentle, moisturizing shampoos; scalp oils (jojoba, coconut); humidifier; avoid hot water.

When to See a Dermatologist

If OTC treatments fail after 4–6 weeks, or if you have severe redness, pain, swelling, or hair loss, consult a specialist. Prescription-strength antifungals, corticosteroids, or other therapies may be needed.