When you drink to much most people will experience a hangover the next day, and this is an unpleasant set of symptoms caused by the alcohol intake previously. When you first wake up and you have a hangover you may notice that your head is throbbing, your mouth is extremely dry, and your stomach is very queasy and you feel nauseous. The best way to avoid a hangover is to drink in moderation, but if it is too late then try to drinks fluids and get some rest.