Sleep deprivation can worsen a hangover. If you have plans the day after a long night, you might want to reschedule.  Let’s face it:  you were up to the wee hours last night, partying and drinking it up, and while you may have knocked out quickly, all the alcohol you consumed disrupted your REM cycle which helps your body restore itself. Do your body a favor and stay in bed so your body can fix all the damage you did to it.