Patients always have nightmares when they sleep at night, which is more related to their mental and psychological factors. It is often said that “when you think about something, you dream about it at night”. If patients always feel stressed by certain things inside, which leads to mental tension and emotional instability, they will easily have nightmares while sleeping and cause wakefulness. Physiological factors, such as eating too much or being hungry before going to bed, watching horror movies before going to bed will also cause the patient’s brain to be in a hyperactive state, and the heart will have anxious emotions, which will also lead to nightmares. Patients with long-term nightmares should also be considered a reflection of physical illness, patients should pay attention to physical examination. Patients should choose a suitable sleep environment and develop good habits, which will have an auxiliary effect on improving patients’ sleep, and patients should relax their minds.