An impaired skin barrier occurs when the outermost layer of the skin, which acts as a protective shield, becomes damaged or weakened. This can lead to increased moisture loss, making the skin more vulnerable to irritation, dryness, and sensitivity. Common causes include over-exfoliation, harsh skincare products, environmental stressors, and certain skin conditions. Sensitive skin, often a result of a compromised barrier, reacts more easily to stimuli like temperature changes, skincare ingredients, and pollution. To restore the skin's health, it's important to focus on nourishing, hydrating, and strengthening the barrier with gentle, soothing products designed to protect and replenish.