Atopic dermatitis is a common, chronic skin condition in which the skin appears inflamed, red, itchy and dry. It commonly affects children. It is caused by a combination of genetic and environmental factors. Genetic factors include deficiency in the proteins that form the skin barrier. The skin loses moisture more easily, becoming more dry, easily irritated, and hypersensitive. The skin is also more prone to infection (with bacteria, viruses, or fungi). The immune system overreacts to environmental triggers such as pet dander and dust mites. Allergies and asthma may be present more frequently in individuals with atopic dermatitis. In infants, atopic dermatitis often starts as a dry red rash on the cheeks and around the mouth, often made worse by drooling. As children grow older, the rash is more common on the arms, legs, and in areas where they are easily able to scratch. In teenagers, eczema is often on the inside the elbows, behind the knees, on the hands and feet, and around the eyes. Scabies is a common skin problem caused by the human itch mite. People of any age, race and social group can get scabies, regardless of personal hygiene. The mite is transmitted by close skin-to-skin contact. The mite burrows into the upper layers of skin, where it feeds and lays eggs. After a few weeks, the patient develops an allergic reaction causing the very itchy scabies rash. The rash can look like hives, pimples, blisters or scaly and crusted bumps. It is common to see the rash on the hands, feet, underarms, belly button and genitals. It is important to treat all close contacts, not only those who have the rash.