What causes nightmares and how can they be reduced?

Short Answer

Nightmares are often driven by stress, trauma, anxiety, sleep deprivation, and some medications or substances. They can be reduced by improving sleep consistency, lowering stress, and using techniques like imagery rehearsal therapy.

Why This Matters

This matters because nightmares activate threat circuits and result in sleep avoidance, which leads to worse sleep and more nightmares. Rehearsing a safer ending changes the brain’s expectation of danger, resulting in less intense dreaming over time. Addressing nightmares improves sleep quality and can reduce daytime anxiety and hypervigilance.

Where This Changes

If nightmares are trauma-related or frequent and impairing, professional support is often the most effective path. Fever, withdrawal, and new medications can also cause sudden spikes in nightmares, so identifying triggers can be more important than interpretation.

What causes nightmares and how can they be reduced?