The definition of a nightmare is a really bad and distressing dream that causes astrong feeling of fear. A nightmare quickens a person's pulse and makes them sweat.
Sometimes, the sleepers feel so frightened and threatened that they wake up Sleep
experts estimate that 30 to 50 percent of all kids have some nightmares, but luckily,
they usually grow out of them.
Nightmares can be fairly long and complex. The person senses a threat to safety of
life. As the threat increases, so does the sense of fear. A person tends to wake up just as
the threat or danger reaches its peak.
About 3 percent of young adults have frequent nightmares. One in two adults has a
nightmare on occasion. An estimated 2 to 8 percent of adult are plagued with frequent
nightmares. Stress, depression, and anxiety are commonly associated with nightmares
in adults. A major life-changing event can cause them, such as loss of a job, financial
worries, marital difficulties, death of a spouse, or moving to another house. Alcohol
abuse or abrupt withdrawal from alcohol can also lead to nightmares.
Traumatic experiences, such as surgery, brain injury, war, and combats, with their
attendant post-traumatic stress disorder (PTSD), can bring on nightmares. Stress is
thought to be the most common source of nightmares, so relaxation techniques, such as
yoga and meditation, have proven helpful. And eating right before going to bed can
increase the frequency of nightmares, since eating increases metabolism and brain
activities.
What can people do to avoid nightmares?
A Have enough sleep
B Exercise regularly
C. Drunk enough water
D. Feel happy and laugh
E. Keep the mind relaxed​