Why dreams are nightmares - nightmares

Human dreams can be called one of the most unexplored and mysterious spheres of the human psyche. Specialists share all terrible dreams with night terrors and nightmares. For an average person, it would seem, such a division is completely unobvious. But from the medical point of view, these two kinds of terrible dreams are quite different.

Nightmare or fear

A nightmare is a horror film that most often dreams during the deep sleep phase, among the deepest night. Such dreams usually have a very intricate and interesting plot. When a person wakes up in the morning, more often than not he remembers everything that he dreamed quite well.

Yes, such a dream brings a lot of horror, but waking up, a person very rarely feels any vegetative reactions of the body( rapid heart beat or cold sweating).

Night fear has a completely different nature. According to researches of scientists, he arises in a phase of deep sleep, when there should be no dreams at all. Specialists in the field of sleep believe that the sleeper at such times is confronted with some new information flow.

Most often, nightly fears manifest themselves in the first part of the night, about an hour after the person fell asleep. Unlike the nightmare, night fear does not have any plot, and its action lasts only a minute or two. But even this time is enough to frighten a sleeping person almost to death.

Reasons for

We will not consider the psychological causes of nightmares, this is purely a professional sphere. But as it turned out, terrible dreams can also be dreamed for the following reasons:

• low blood sugar can cause nightmares, Therefore, most often they occur precisely at the end of sleep, when the sugar level is low;
• physical exhaustion can cause a decrease in the functions of the immune and adrenal system of the body. Therefore, terrible dreams can arise;
• is a very common cause of nightmares is a disease. When the brain overheats because of the heat, it leads to terrible dreams. In addition, the cause of this phenomenon can be and all sorts of disorders of the respiratory system. When you sleep and you can not breathe easily, you may have a dream that you are suffocating;
• a heavy, stressful day can also cause you to have a nightmare. Often it is after such days a person has a desire to go to bed later and, possibly, drink a little alcohol to relax. But a mixture of stress hormones and alcohol also leads to a drop in blood sugar levels. Do you want to aggravate the situation even more? Then look before going to bed a terrible movie. The nightmare in this case you will be virtually guaranteed.