Just like swimming in a chlorinated pool, showering in chlorinated water affects your skin and hair. Over time the chlorine will dry out your hair, requiring the use of conditioners for your hair and for those with chemically treated hair (colored) you may also bleach out your color. Your skin is an organ whose pores soak up chlorine when showering and vapors from steam. Because your skin does this, it can leave your skin itchy and uncomfortable.