Eczema runs in families. Certain genes can make some people have extra-sensitive skin. An overactive immune system is thought to be a factor as well. Also, it’s thought that defects in the skin barrier contribute to eczema. These defects can allow moisture out through the skin and let germs in.
Factors that may trigger eczema include:

  • Stress

  • Contact with irritating substances such as woolen and synthetic fabrics and soap

  • Heat and sweat

  • Cold, dry climates

  • Dry skin