Modern research shows that dreams are an episodic activity caused by the local brain tissue that has not completely stopped excitatory activity when people are sleeping. In simple terms, dreams are some traces of the stimuli in the living environment left in the cells of the human cerebral cortex. All the things felt by the senses of sight, hearing, touch and taste leave traces in the brain. At night, when the body is asleep, part of the brain nerves do not rest and are no longer under conscious control, and the traces in the brain continue to be active, resulting in dreams. Sleeping and dreaming is a normal physiological phenomenon. If you have more dreams at night and feel tired and depressed after waking up in the morning, you need to adjust your habits and develop good resting habits. Before going to bed, you should put down the work pressure and bad mood, not full, do not drink coffee, strong tea, you can use hot water to soak your feet to relax the muscles, can improve the quality of sleep. If there are many nightmares, shouting and panic feeling at night, and serious impact on life and work, you need to go to the neurology department for treatment.