Transepidermal Water Loss
What is Transepidermal Water Loss (TEWL) TEWL is the amount of water vapor evaporating from the surface of the skin. In healthy skin, TEWL is directly proportional to skin hydration. Many skin diseases have inverse ratios of TEWL and skin hydration (i.e., increased TEWL with decreased skin hydration, as is seen in atopic dermatitis and disorders…
