Scalp contact dermatitis is an irritation or allergic reaction from an ingredient(s) found in hair care and styling products.
Two Types
- Irritant: Caused by chemicals (shampoos, bleach, straighteners)
- Allergic: Caused by ingredients like PPD (hair dye), fragrances, preservatives, or essential oils
Symptoms
- Redness, flaking, or weepy patches
- Burning, itching, or tenderness
- Temporary hair loss at the affected areas
- Reaction behind the ears or hairline
Diagnosis
- Based on hair care history
- Patch testing may identify the specific allergen
Treatment
- Stop using suspected products
- Switch to fragrance-free shampoos (e.g., Vanicream, CLn, Free & Clear, Sebamed)
- Prescription topical steroids
- Oral antihistamines (e.g., Zyrtec, Claritin) for itching
What to Use Instead
- Styling products: Fragrance- and alcohol-free
- Hair dyes: PPD-free or allergy-tested formulations
Most cases improve quickly once the trigger is removed and the scalp is allowed to heal.
When to See a Dermatologist
- Your symptoms don’t improve with OTC shampoos
- You experience significant itching, redness, or scaling
- Your condition affects your confidence or quality of life
- You’re experiencing hair shedding, pain, or bleeding
- You suspect an allergic or autoimmune cause
