The following reasons for the elderly to scream at night: 1, caused by brain atrophy, as people grow older, there will be brain tissue atrophy, patients can appear cognitive decline, hallucinations at night, and in serious cases, there will be shouting and screaming, you can give patients to check the head CT or nuclear magnetic examination, treatment can be given to oral Olacitant, brain protein hydrolysate tablets and other drugs to improve brain function. 2.The elderly can also be seen in patients with pulmonary encephalopathy, which is also known as type II respiratory failure, due to respiratory diseases. The phenomenon of nightmares can be seen in elderly people who have poor sleep quality and can suffer from excessive dreaming, and patients can be given oral medication to improve sleep.