The postdrome is the fourth of four potential phases of a Migraine attack. The majority of Migraineurs take hours to fully recover; some take days. Many people describe postdrome as feeling "like a zombie" or "hung-over." These feelings are often attributed to medications taken to treat the Migraine, but may well be caused by the Migraine itself. Postdrome symptoms may continue for up to 24 hours after the end of the headache stage. In cases where prodrome and/or aura are experienced without the headache phase, the postdrome may still occur. The symptoms of prodrome may include:
• lowered mood levels, especially depression • or feelings of well-being and euphoria • fatigue • poor concentration and comprehension • lowered intellect levels
You can read more about postdrome in Anatomy of a Migraine.