What exactly is a dream? Dreaming is a normal and essential physiological and psychological phenomenon in the human body. After a person falls asleep, a small number of brain cells remain active, which is the basis of dreams. Why do people dream and how do they react if they do not dream? Dreaming is associated with rapid eye movement sleep, that is a state of light sleep that occurs late in sleep and is characterized by rapid horizontal eye movements, stimulation of the pontine brain, increased breathing and heart rate, and temporary limb paralysis. Dreams may also occur during other periods of sleep, although they are less common. The state of falling asleep that occurs while entering deep sleep is thought to be related to dreaming. Scientists have done some experiments to block people from dreaming. It was found that the deprivation of dreams leads to a series of physiological abnormalities, such as increased blood pressure, pulse rate, body temperature and skin point reactivity, and reduced function of the vegetative nervous system, and also causes a series of adverse psychological reactions, such as anxiety, nervousness, irritability, perception hallucinations, memory loss, and so on. It also causes a series of adverse psychological reactions, such as anxiety, nervousness, irritability, perceptual hallucinations, memory disorders, orientation disorders, etc. It is obvious that normal dream activity is one of the most important factors to ensure the normal activity of the organism. Since the activity of the right hemisphere is dominant in dreams, and the left hemisphere is dominant after waking up, during the 24-hour circadian activity of the organism, waking and dreaming alternately can achieve the dynamic balance of neural regulation and mental activity. Therefore, dreaming is a way to coordinate the balance of the human psychological world, especially it has a more obvious effect on human attention, emotions and cognitive activities. Dreamless sleep is not only of poor quality, but also a sign of brain damage and disease. Recent research findings also support the idea that dreams are the result of the brain’s regulatory centers balancing the various functions of the body, and that dreams are necessary for the healthy development of the brain and the maintenance of normal thinking. If the regulating center of the brain is damaged, no dreams can be formed, or only some fragmented dream fragments can appear, and if there is no dream sleep for a long time, it is worth to be alarmed. Of course, if you have nightmares for a long time, it is often a sign of physical weakness or disease. As long as you sleep, you will dream. People who say they don’t dream just forget that they do. Dreams are a conversation between the left and right brain. After the light sleep stage lasts for 90 minutes, you enter the deep sleep stage, during which you will have a dream or two. Usually, the dreams that can be recalled are the ones made before waking up, and most of them are the ones made in the early morning hours. I believe that many people have similar experiences: after waking up from a nightmare in the middle of the night and going back to sleep, they will forget most of the dream when they wake up the next day. This is because the brain processes and sifts through the memory of the facts that woke up in the dream. Some people will say, “I didn’t sleep well after a night of dreaming.” Despite what they say, this is not the case. According to experts, dreams during sleep make people feel like they last a very long time. In reality, a dream lasts no more than 5 seconds at most. The maximum number of dreams in a night is up to 5 times a night. As you can see, the time spent tangled with dreams does not exceed 25 seconds, and there is not much time for peaceful sleep. You can adjust according to the following ideas: 1, correct understanding of sleep Sleep pursues quality, not time, sleep time varies from person to person and from age to age, sufficient sleep is not seen from the number of hours, but depending on whether mental and physical strength can be restored as the standard, adults generally maintain 7 to 8 hours can be, the specific time depends on individual differences. 2, shorten the sleep time Sleep should pay attention to the “quality”, not “quantity”. If you sleep less, you will not spend a long time roaming in the dream and wake up drowsy. 3, have sleep in sleep, get up on time If you feel that you can not fall asleep in bed for 10 minutes (the elderly can not fall asleep in bed for 20 minutes), you should get up immediately and go to another room. Getting up immediately when you can’t sleep allows your bed and you to fall asleep immediately to establish a connection. Regardless of how much sleep you get each night, set your alarm clock and get up on time each day.