the "prodrome" (the period leading up to a migraine) is sometimes accompanied by an intense sense of dread. the "postdrome" is sometimes compared to a hangover that can linger multiple days. they can both cause fatigue, mood issues, and muscle stiffness/tension.
anyway migraines fuckin suck. it's like a multi-phase boss fight except you're the only one taking damage
uhh something with the brain i guess. definitely neurological