What causes a hangover, and how can we get rid of it?

My biology teacher at school told us: "You don't buy a beer, you rent it." But it's not only alcohol that contributes to hangovers — other compounds in alcoholic drinks like congeners and sulfites, which are particularly common in darker drinks like red wines and whiskeys, also play their part. Hangover symptoms and their causes Alcohol affects multiple systems in the body, which explains the many symptoms of hangovers. Worse hangovers could have genetic origins It's obvious that drinking more alcohol causes worse hangovers, but it's never quite that simple. There's a huge range in people's experiences with hangovers: some get them worse than others, and from less alcohol too.