Atopic dermatitis is a prevalent disease spreading worldwide with an increasing incidence. It affects men and women equally and accounts for 10% to 20% of all dermatologists' referrals. Atopic dermatitis most commonly occurs in young people and children, and this incidence decreases with age. Scientists estimate that 65% of patients develop symptoms in the first years of life, and 90% develop symptoms before five. Onset after the age of 30 is much rarer and usually occurs after exposure of the skin to harsh living and working conditions. People living in urban areas and climates with low humidity seem to have an increased risk of developing atopic dermatitis. About 10% of all adolescents and young children have an unpleasant experience with atopic dermatitis symptoms. Approximately 60% of these children continue to have one or more atopic dermatitis symptoms equally at adulthood.