Dreaming can produce extremely active chemical reactions in the brain, leading to the peak of protein synthesis and renewal of brain cells, while fast-flowing blood brings oxygen and nutrients, and takes away waste, so that brain cells that cannot self-renew can quickly update protein components, preparing for intense activities in the future. Therefore, to some extent, dreaming contributes to brain function.
Some cells in the brain don't work when awake, but when people fall asleep, these cells are "practicing" their own functions, so dreams are formed. Dreams give people painful or pleasant memories. Dreams exercise the function of the brain. Dreams can sometimes lead you to change your life, and can also partially solve the conflicts when you are awake, making your life more fulfilling.
Sweet dreams often bring people pleasant, comfortable and relaxed feelings, make people clear-headed, enhance their thinking activities, help people's digestion and physical and mental health, help stabilize people's emotions, promote and improve people's intellectual activities, and sprout inspiration and creative thinking. It is no wonder that people in some countries and regions still regard "sweet dreams" as a pet phrase to say hello before going to bed.
Nightmares not only make people unhappy, but also interfere with sleep and affect the functional activities of the brain. In addition, nightmares are often early signs of cancer and other diseases. In particular, frequent and repeated nightmares with roughly the same content can predict obvious symptoms of the disease, reveal the location, nature and severity of the disease, and make predictions a few days, a month or even a year before the patient's external symptoms are revealed.
Nightmares have psychological, physiological and pathological reasons. Mental depression, many physical diseases and indigestion can all lead to nightmares. For people with severe heart disease, cerebral arteriosclerosis and cerebral aneurysm, nightmares are more likely to induce and aggravate serious diseases such as heart failure, myocardial infarction, cerebral hemorrhage, cerebral infarction and subarachnoid hemorrhage. It can be seen that nightmares have adverse effects on intelligence, physical strength and health, and should be avoided as much as possible. Even if you don't have nightmares, if you have a lot of dreams during the whole night's sleep, but you remember them clearly, it is also a kind of sleep disorder, indicating that the inhibition process of his brain is too shallow, which will inevitably affect the elimination of emotions and fatigue, and will also make you sleepy during the day, and it is difficult to concentrate, which will seriously affect normal study and work.