Nightmare disorder, also known as 'dream anxiety disorder', is a sleep disordercharacterized by frequent nightmares. The nightmares, which often portray the individual in a situation that jeopardizes their life or personal safety, usually occur during the second half of the sleeping process, called the REM stage. Though such nightmares occur within many people, those with nightmare disorder experience them with a greater frequency.
During the nightmare, the sleeper may groan and move slightly. The victim is often awakened by these threatening and frightening dreams and can often vividly remember their experience. Upon awakening, the sleeper is unusually alert and oriented within their surroundings, but may have an increased heart rate and symptoms of anxiety, like sweating. They may have trouble falling back to sleep for fear they will experience another nightmare.
A person experiencing nightmare disorder would have trouble going through everyday tasks; the anxiety and lack of sleep caused by the fearful dreams would hinder the individual from completing everyday jobs efficiently and correctly.
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