Stress regulating hormones are triggered and that opens the floodgates.

Erica Komisar argues that ADHD is not a neurological disorder but a stress response. The result of the brain’s stress-regulating system being activated too early.
Prolonged separation from mothers, locks children into chronic fight-or-flight: distractibility is the flight response, aggression the fight.
Erica Komisar is a clinical social worker, psychoanalyst, parent coach, and author. With over thirty years of experience in private practice, she works to alleviate pain in individuals who suffer from depression, anxiety, eating, and other compulsive disorders. She is the author of Being There: Why Prioritizing Motherhood in the First Three Years Matters.