Influence of Bathing or Washing on Skin Barrier Function in Newborns during the First Four Weeks of Life

Background and Objectives: After birth, skin barrier function is in state of flux and at risk of dysfunction. In a prospective clinical study, we compared the effects of 2 standard cleansing procedures on skin barrier function in newborns. Methods: Fifty-seven healthy full-term neonates aged ≤48 h were randomly assigned to either a bathing group (group B; n = 29), who were bathed with clear water twice weekly, or to a washing group (group W; n = 28), who were washed with a washcloth moistened with clear water twice weekly. Transepidermal water loss (TEWL), skin pH, stratum corneum hydration (SCH) and sebum production were measured at days 2, 7 and 28 of life on the forehead, abdomen, upper leg and buttock. Results: Group B showed significantly lower TEWL on the buttock and higher SCH on the abdomen and forehead compared to group W at day 28. Conclusions: Both skin care regimens do not harm the adaptation of the skin barrier in healthy neonates within the first 4 weeks of life. Skin barrier function differentiates after birth in a regionally specific fashion.