I had a doctor explain why routines are very important. She'd explained that migraineurs, ppl with epilepsy and ppl with bipolar (and PTSD) have sensitive/sensitized brains. The sensitive brain types are more stable with routines, including routine meal times, etc.
I strive for routine even though I am not a routine type person anymore. I find keeping routines difficult now; yet, I keep trying.

WC