Dream talking and yelling is not a disease. Many people have the phenomenon of dream talking, and the reasons for its formation are related to the patient’s high psychological stress or poor living habits and bad sleeping environment. Many patients are more nervous, stressed and emotionally unstable during the day, which can easily lead to shouting and dreaming at night while sleeping. Patients who watch scary movies and dramas before going to bed, resulting in mental instability, will also have the problem of yelling while sleeping. If the sleep environment is not good or if the patient has bad sleep habits, such as sleeping with the hand easily on the chest position or sleeping on the stomach. Patients are prone to nightmares during nighttime sleep, so they may also have problems with talking and yelling in their sleep.