Dreaming about fear

• Threat rehearsal, the evolutionary reading.
• Waking anxiety, which correlates with nightmare frequency reasonably well.
• The unresolved, since dreams work preferentially on unfinished material.
• Ordinary dreaming, most of the time.

Fear that resolves (the dreamer turns, fights, escapes, or discovers the threat was nothing) is one of the most satisfying things that can happen in a dream, and in recurring nightmares it is the change that matters most.

Some dreamers report frightening dreams as invigorating rather than distressing, particularly where the fear was adventurous rather than helpless.

Nightmares, frightening dreams that wake you, are distinct from merely bad dreams, and the distinction is clinically meaningful. Waking is the dividing line.

Frequent nightmares that affect daytime functioning are a recognised condition and a treatable one. If nightmares are waking you regularly, that is worth a doctor's attention, and imagery rehearsal therapy has real evidence behind it.

Threat-simulation theory proposes that the over-representation of fear and threat in dreams is functional, a rehearsal system.

The affect network dysfunction model (Nielsen and Levin) proposes nightmares arise from a combination of accumulated emotional load and an impaired ability to extinguish fear during sleep. It accounts well for why nightmares increase under stress and in PTSD.

Both are frameworks with support rather than settled fact, and they are not mutually exclusive.

Nightmare traditions are among the most widespread in folklore, and the word itself comes from the mare: a crushing night spirit, the same lineage as the sleep-paralysis material.

Fear is the most commonly reported dream emotion, and negative emotions outnumber positive in dream content generally.

Nightmares are distinguished from bad dreams by awakening, and nightmare frequency is associated with waking stress, trauma, some medications and alcohol withdrawal.

Imagery rehearsal therapy has good evidence for reducing chronic nightmare frequency, including in PTSD.

• Did it wake you? The line between a bad dream and a nightmare.
• How often is this happening?
• Is it the same dream?
• Has anything changed: stress, medication, alcohol, sleep timing?

Nightmare frequency is one of the most useful things a journal tracks, because it responds to things you can change. The sleep log's alcohol, medication, stress and timing fields exist largely to make this correlation visible.

If a specific nightmare recurs, the nightmare-rescripting programme is the appropriate tool.