What it isDeliberately delaying or refusing sleep despite no external reason. In trauma survivors, often driven by fear of nightmares; in others, by bedtime procrastination or revenge bedtime behavior.

Why it mattersSleep avoidance is a maintaining factor in PTSD-related sleep disturbance and in chronic insomnia. Treatment requires addressing the underlying reason for avoidance, not just better sleep hygiene.

Think of it like thisIf your bedroom has become the place where bad dreams happen, you’ll find reasons to stay out of it, like avoiding a room you got hurt in. Sleep avoidance keeps the trauma-sleep loop alive.

Voluntary delay of sleep onset despite adequate sleep opportunity and absence of pressing demands, often driven by fear of nightmares (in PTSD), conditioned arousal in the bedroom (in chronic insomnia), or bedtime procrastination unrelated to sleep pathology.

MechanismIn PTSD-related sleep avoidance, anticipation of trauma-related nightmares creates conditioned bedtime anxiety. The amygdala threat-detection associates the bedroom with danger; behavioral avoidance reduces immediate anxiety but reinforces the threat association. In bedtime procrastination, executive function fatigue at end of day reduces self-regulatory capacity.