Skin barrier repair refers to the process of restoring the stratum corneum's integrity and function. This outermost layer of the epidermis acts as a critical protective shield against environmental aggressors, prevents transepidermal water loss (TEWL), and maintains skin hydration. Impaired barrier function can lead to dryness, irritation, sensitivity, and exacerbate conditions like eczema. Repair strategies often involve topical emollients, ceramides, fatty acids, and humectants to replenish lipids and strengthen the barrier.