Alcohol dehydrates your body generally, including the skin – your body's largest organ. This happens every time you drink. Drinking too much is also thought to deprive the skin of vital vitamins and nutrients. Over time, drinking heavily can have other, more permanent, detrimental effects on your skin. Rosacea, a skin disorder that starts with a tendency to blush and flush easily and can eventually lead to facial disfigurement, is linked to alcohol.