Hypnagogic exploding head syndrome

**Definition:** Hypnagogic exploding head syndrome is characterised by the perception of a sudden, loud noise or sense of a violent explosion in the head that typically occurs as the individual is falling asleep. On occasion, these episodes may occur with awakening during the night. They are associated with abrupt arousal following the event, often with a sense of fright.

**Inclusions:** - Hypnagogic sensory disturbance