What you want to ask is when do people's dreams most often appear in their sleep? Rapid eye movement. According to the inquiry, doctors show that people's sleep is divided into non-rapid eye movement period and rapid eye movement period, and there are 4-6 cycles in one night. Rapid eye movement (REM) is the stage of dreaming, and at least 4-5 dreams will be made in one night. Non-rapid eye movement period is divided into four periods. In the third and fourth stages, people are in a state of deep sleep, which is the most tiring stage.