Staying up late can cause memory loss. For example, young office workers who often work late at midnight, those who like to sleep late at midnight, those who like to go online very late and those who play video games will experience memory loss in the long run. In addition, the elderly or people of all ages due to various reasons caused by lack of sleep can cause memory loss. The principle of the current scientific research found that people in sleep is actually the brain self-recovery and removal of metabolic waste products in the brain process, lack of sleep people’s metabolic products can not be discharged in a timely manner, this situation will cause the accumulation of metabolic waste in the brain. One of the most important pathological changes in Alzheimer’s disease is the increase in the deposition of a protein called Aβ in the brain, which is actually the garbage in the metabolic process. If this garbage is not removed effectively in time, the accumulation in the brain will lead to many diseases such as Alzheimer’s disease and other neurodegenerative diseases, all of which are closely related to dementia.