Skin can be sensitive by nature. More often, however, it becomes sensitive because of our modern way of life and increasingly aggressive, negative environmental influences. These weaken the skin’s natural protective acid mantle and reduce its ability to ward off harmful influences. In response, the skin becomes reddened and irritated and feels unpleasantly tight. Frequently such constant stress accelerates the skin aging process, leaving skin looking patchy, flaky and more susceptible to fine lines and wrinkles.