There are several factors that play an important role in whether or not you'll have a hangover after getting absolutely sh*t-faced. Many of the causes are obvious and most of the time we know what our own limitations are, but still we go on drinking more and more without thinking of the possible outcome.We can divide the causes of hangovers into 2 main categories... * Direct Alcohol effects on body systems * Effects of factors other than alcoholDirect Alcohol effects on body systemsThe direct effect on the body of excessive alcohol consumption seems to produce the most unpleasantness. Here are several ways that alcohol directly contributes to hangover symptoms...Dehydration & Electrolyte ImbalanceAlcohol consumption increases urine production, which causes dehydration in the body...