Masking fundamentally relies on the brain's 'Inhibitory Control' network. The natural ADHD state is uninhibited: thoughts are spoken immediately, and physical energy is expressed through movement (stimming/fidgeting).
To mask, the prefrontal cortex must send constant "stop" signals to the motor cortex (to stop fidgeting) and the language centers (to stop blurting). But the ADHD prefrontal cortex is inherently weak and dopamine-deficient. To sustain this unnatural inhibition for hours, the brain relies on the adrenal system. It pumps cortisol and adrenaline to force the prefrontal cortex to stay online.
This creates a state of acute, prolonged stress. The brain is burning glucose at an unsustainable rate. When the social demand finally ends, the adrenaline plummets. The resulting "Sensory/Social Hangover" is a period of severe ego-depletion where the brain literally lacks the fuel to do even basic tasks, requiring profound sensory-deprived rest to synthesize more neurotransmitters.
