——Dreams have nothing to do with good or bad luck. Many people have this trouble: after falling asleep, they often have nightmares or even wake up. Because I didn't sleep well, I felt dizzy the next day, which affected my work and study. Some people also worry that nightmares will bring bad luck to them, causing psychological fear and uneasiness. In fact, dreaming is a normal psychological phenomenon that occurs during sleep. Under normal circumstances, the nerve cells in the brain are in a state of inhibition during sleep. This inhibition process is sometimes complete and sometimes not complete. If the brain is not completely inhibited and nerve cells in a few areas of the cerebral cortex are excited, people will have dreams. Because the activity of a few cells loses the control and regulation of the entire cerebral cortex in the waking state, certain fragments in the memory become active without restraint, which may lead to strange dreams that are different from normal mental activities. At this time, if the nerve cells related to language and movement are also in an excited state, not only will dreams occur, but sleep talking or sleepwalking will also occur. So how can you reduce nightmares? Pay attention to your sleeping body position. It is generally better to sleep on the right side. When sleeping on your back, your hands and feet should be naturally vertical, and the pillow should not be too high. Correct the bad habit of sleeping on your stomach.