(NewWorldWinemaker) - It’s happened to the best of us and, unfortunately, we all know the feeling: Waking up the next morning, feeling like death warmed up and swearing you’ll never drink again. But what exactly is a hangover and what in wine causes hangovers? For those who don’t know, common features of hangovers include headaches, nausea, fatigue, dehydration and weakness, even mild depression. I must admit I didn’t realize hangovers are that complex until I started to research them. It gets a little technical, I know, but hang in there – it’s pretty interesting!