Alcohol consumption can have several negative effects on the skin. Some of the common effects include dehydration, inflammation, puffiness, redness, and premature aging. Alcohol can also dilate blood vessels in the skin, leading to a flushed appearance. Additionally, alcohol can disrupt the skin's natural barrier function, making it more susceptible to damage from external factors such as UV rays and pollutants. Overall, excessive alcohol consumption can contribute to dull, dehydrated skin and exacerbate skin conditions such as acne and rosacea. It is important to moderate alcohol intake and stay hydrated to help maintain healthy skin.