The use of cosmetics by children and adolescents increases the risk of sensitization, which may cause allergic or irritative contact dermatitis. It is more common in girls. Cosmetic reactions can be of two types: 1) Allergic or hypersensitivity contact dermatitis resulting from previous sensitization; 2) Irritative contact dermatitis that occurs after product application (redness, itching, burning). There is no immune mechanism. Nickel is the sensitizer most related to pediatric contact dermatitis. It is present in piercings, earrings, bracelets, necklaces and rings. In addition, some cosmetics may contain metals: nail polish, eye shadow, eye mascara, eyeliner and lipstick. Other allergens reported

The skin is the largest organ in the human body with vital functions such as the integrity of the barrier, thermoregulation, immune function, protection against ultraviolet rays and protection against invading microbes. A baby´s or children´s skin is different from adult one. Baby´s skin is thinner, more sensitive and offers less defense to microorganisms. The immersion bath is the most indicated, using mild products that do not significantly affect the pH of the skin. Sponges should not be used. The excess of baths can alter the bacterial flora and barrier function of the skin. In newborns, the umbilical stump should