Drinking alcohol also causes facial blood vessels to dilate, and repeated overindulgence can cause the vessels to dilate permanently, causing red, spidery veins [source: Freedman]. And if you have a pre-existing skin condition, excessive alcohol use can worsen it. Alcohol consumption may exacerbate flare-ups of rosacea and psoriasis, and dermatologists recommend minimizing your intake to avoid these issues [source:American Academy of Dermatology].
If you drink, moderate alcohol consumption is the best way to avoid any negative side effects. And after a night on the town, water will help to counteract the dehydration that comes with drinking alcohol. Avoid the greasy foods often associated with hangover cures and replace them with healthier, nutrient-rich foods to reverse some of the negative effects of a night out.