Water Is an Irritant

Water is a “weak” irritant to the skin: prolonged exposure strips away natural oils and disrupts the skin’s protective barrier. Not all water is equally irritating, though — hot, chlorinated, or mineral-heavy water is significantly worse.

Hot water aggressively strips the skin of natural lipids (sebum), leaving it dry and prone to irritation. Chlorine, commonly found in tap water, acts as an oxidizing agent that can further weaken the skin barrier. Meanwhile, hard water — water rich in calcium and magnesium — reacts with soap to form insoluble residues that cling to the skin, compounding the drying effect.

If your skin feels tight or itchy after a shower, the water itself may be partly to blame. The simplest fix: use lukewarm water, close to body temperature, and keep showers short.