Emotional factors and some infections can also influence atopic dermatitis. Irritants are substances that directly affect the skin and, when used in high enough concentrations with long enough contact, cause the skin to become red and itchy or to burn.
Specific irritants affect people with atopic dermatitis to different degrees.
Over time, many patients and their families learn to identify the irritants most troublesome to them. For example, wool or synthetic fibers may affect some patients. Also, rough or poorly fitting clothing can rub the skin, trigger inflammation, and cause the itch-scratch cycle to begin. Soaps and detergents may have a drying effect and worsen itching, and some perfumes and cosmetics may irritate the skin. Exposure to certain substances, such as chlorine, mineral oil, or solvents, or to irritants, such as dust or sand, may also make the condition worse.