It's okay. It doesn't matter if you hang white clothes on the bedroom wall. This nightmare doesn't matter. Dreams have nothing to do with bad luck and good luck. One thing is that you think about it every day and dream at night. Some people like to watch some thrilling videos or novels. These stimuli form a memory representation, and once you enter a dream, it is easy to dream about it. Secondly, because people sleep badly, such as sleeping on their stomachs or putting their hands on their chests to oppress their hearts, it is easy to have some horrible nightmares. Some people also have nightmares when they are sick, such as headache and fever, bad heart, lack of oxygen or blood supply to the brain. At ordinary times, you should watch more healthy, beneficial, relaxed and happy movies or novels, watch less or try not to watch movies or novels that are easy to form nightmare scenes, and avoid bad stimuli being stored in your memory. It is best not to use your brain too much before going to bed, so as to avoid the excessive excitement of the cerebral cortex and cause dreams.
Pay attention to your body posture when you sleep. Generally speaking, it is better to sleep on the right. When sleeping on your back, your hands and feet are naturally vertical, and the pillow should not be too high. We should correct the bad habit of sleeping on our stomach.
Prevent physical illness. Many experiments show that physiological and pathological stimuli in the human body may be programmed into dreams. There is some slight inflammation in the human body, which is often not felt in the conscious state, and the slight stimulation caused by inflammation may lead to nightmares during sleep. If someone appears in a dream and his throat is pinched, it is later found to be pharyngitis.