front of the face is often due to gold (from jewelry and foundation), make-up, moisturizers, wrinkle creams, and topical medication. Along the eyelids as well as the sides of the head and neck, dermatitis is often caused by shampoo and conditioner dripping down from the hair. Inflammation on one side of the face often suggests transfer of an allergen from the hands or from the face of a partner. Epidemiology Allergic contact dermatitis is common, affecting up to 20% of all people. People sensitive to one allergen are at an increased risk of being sensitive to others. Family members of those with allergic contact dermatitis are at higher risk of developing it themselves. Women are at higher risk of developing allergic contact dermatitis than men. References External links Contact dermatitis