Freud's dream interpretation theory holds that the human body is stimulated during sleep: if the room is too cold, it will dream of being trapped in a valley of ice and snow; When the weather is too hot, I will dream that I am next to a flame or volcano; When you are too thirsty, you will dream of looking for water everywhere in the desert; When the bladder is full and stimulated, you will dream of looking for the toilet everywhere and can't find it. Volcanic eruption should be explained by internal heat. It is suggested that the landlord eat more cool fruits, drink more water and pay attention to his health.