Lack of sleep will bring many physical and mental injuries: decreased thinking ability, weakened alertness and judgment, imbalance of immune function and so on. In recent years, experts believe that adequate sleep, a balanced diet and proper exercise are the three legs of a healthy life. Sleeping less is like being in debt, and there is a price to pay. Previous sleep studies mainly focused on the impact of sleep time on health. Many studies have found that if ordinary people don't sleep well for two or three days, they will make up for it in a few days and return to normal. However, recent research has noticed that if you sleep/kloc-0 every day or sleep less than half an hour, the long-term accumulated "sleep debt" will have a great impact on a person.