Detailed answer

Alcohol is a diuretic, meaning it increases urine production, leading to dehydration in the body. This dehydration affects the skin's moisture levels, making it dry and dull. Alcohol also hampers the production of vasopressin, a hormone that helps regulate water balance in the body. As a result, the skin loses its natural hydration and becomes more prone to fine lines, wrinkles, and flakiness. Additionally, alcohol can dilate blood vessels, leading to facial redness and irritation.