Cocamidopropyl betaine is a detergent that appears in many soaps, shampoos, and toothpastes, including Cetaphil and Dove products, and Colgate toothpaste. Patients with this allergy may present with dermatitis behind the ear, where shampoo tends to collect; this allergen should be suspected in children with persistent hand dermatitis.
When treating children with allergic contact dermatitis, allowing time for questions and patient education after the patch test is paramount, Dr. Jacob emphasized. Also, recognize the discomfort and frustration children may feel about the patch test process, and about the elimination or reduction of favorite foods, jewelry, or other products. Provide information about safe alternatives. “I can't stress this enough,” she said.
Databases such as the Contact Allergen Replacement Database, available through the American Contact Dermatitis Society (www.contactderm.org
Allergic contact dermatitis can be caused by anything from toys to food. Courtesy Dr. Sharon E. Jacob