Overview

Nightmare disorder is a pattern of repeated frightening and vivid dreams that cause significant distress or impaired functioning. Nightmare disorder is one type of parasomnias, which are behavioral sleep abnormalities.

Nightmare disorder ranges in severity based on the occurrence of nightmares:

  • Mild: Less than one nightmare per week on average.
  • Moderate: One or more nightmares per week, but less than nightly.
  • Severe: Nightmares every night.

It can also vary in duration:

  • Acute nightmare disorder lasts one month or less.
  • Subacute nightmare disorder lasts at least one month but less than six months.
  • Chronic nightmare disorder lasts for six months or longer.

Nightmares typically occur during the second half of your sleep period during REM (rapid eye movement) sleep. With nightmare disorder, you remember them upon awakening (unlike sleep terrors).

This condition can significantly disrupt your sleep and affect your quality of life. It can also make underlying mental health conditions, such as depression or anxiety, worse.

Who does nightmare disorder affect?

Nightmare disorder can affect anyone, including children and adults.

It’s more likely to affect people who have any of the following conditions:

  • REM behavior disorder (RBD).
  • Narcolepsy.
  • Sleep apnea.
  • Periodic limb movement disorder (PLMD).
  • Post-traumatic stress disorder (PTSD).
  • Generalized anxiety disorder.
  • Social anxiety disorder.
  • Depression.

Nightmare disorder occurs in people who have social anxiety disorder or generalized anxiety disorder at approximately three times the rate of the general population. It affects 50% to 90% of people with PTSD.

How common is nightmare disorder?

Approximately 2% to 8% of the general U.S. population has nightmare disorder.

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Symptoms

When to see a doctor

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Complications

Blood clots are a dangerous complication of atrial fibrillation (AFib). Blood clots can lead to stroke.
The risk of stroke from AFib increases as you grow older. Other health conditions also may increase the risk of a stroke due to AFib. These conditions include:
  • High blood pressure.
  • Diabetes.
  • Heart failure.
  • Some types of heart valve disease.
Blood thinners are commonly prescribed to prevent blood clots and strokes in people with atrial fibrillation.

Prevention

Healthy lifestyle choices can reduce the risk of heart disease and may prevent atrial fibrillation (AFib). Here are some basic heart-healthy tips:
  • Control high blood pressure, high cholesterol and diabetes.
  • Don't smoke or use tobacco.
  • Eat a diet that's low in salt and saturated fat.
  • Exercise at least 30 minutes a day on most days of the week unless your health care team says not to.
  • Get good sleep. Adults should aim for 7 to 9 hours daily.
  • Maintain a healthy weight.
  • Reduce and manage stress.


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