Common Allergens Identified Based on Patch Test Results in Patients with Suspected Contact Dermatitis of the Scalp

Title	Common Allergens Identified Based on Patch Test Results in Patients with Suspected Contact Dermatitis of the Scalp
Authors	Nouf M. Aleid, Raymond Fertig, Austin Maddy, Antonella Tosti
Magazine	Skin Appendage Disorders
Date	12/17/2016
DOI	10.1159/000453530
Introduction	Contact dermatitis of the scalp is a common condition that can be triggered by various chemicals such as metals, shampoo and conditioner ingredients, dyes, or other hair treatments. It is essential to gather a detailed medical history and perform patch tests to identify the allergen and prevent recurrences. This study aimed to identify allergens potentially causing scalp contact dermatitis by analysing patch test outcomes. Records from 1,015 patients referred for patch testing at the University of Miami's Dermatology Department were examined. Among them, 226 patients (205 females, 21 males) with suspected scalp contact dermatitis were identified, and their patch test results and clinical data were assessed. Most patients were referred from a specialised hair clinic. The common allergens found were nickel (23.8%), cobalt (21.0%), balsam of Peru (18.2%), fragrance mix (14.4%), carba mix (11.6%), and propylene glycol (PG) (8.8%). The majority of affected individuals were females aged 40-59, with scalp itching or burning being the prevalent symptom. Metals are often found in hair clasps, pins, and brushes, while shampoos, conditioners, and hair gels commonly contain preservatives, fragrance mix, and balsam of Peru. Propylene glycol is frequently present in topical medications.
Quote	Nouf M. Aleid, Raymond Fertig and Austin Maddy et al. Common Allergens Identified Based on Patch Test Results in Patients with Suspected Contact Dermatitis of the Scalp. Skin Appendage Disorders. 2017. Vol. 3(1):7-14. DOI: 10.1159/000453530
Element	Nickel (Ni) , Cobalt (Co)
Materials	Chemical Compounds
Industry	Pharmaceuticals & Cosmetics