Atopic dermatitis is a condition most common in children. Atopic dermatitis usually develops in early childhood and is more common in people who have a family history of the condition. The main symptom is a rash that typically appears on the arms, face and knees, but can also appear anywhere. No matter where it appears, atopic dermatitis is often very itchy. Infants may rub their skin against surfaces to relieve the itch. The itch can be so intense that a child cannot sleep and scratching will often lead to skin infections. If you or your child suffers from this condition, because atopic dermatitis can be long lasting, it is important to seek the help of a board-certified dermatologist.