Entering the spring after the temperature rises, the body’s metabolism will gradually increase, the body’s energy needs will increase, the consumption will also become more, so the body may produce some of the phenomenon of non-adaptation, there is a lack of energy supply, which will lead to spring sleepiness. In addition, due to the changes in the biological clock in spring, the length of day and night changes, people sleep will become early and late, or sleep pattern has some changes, can also lead to spring sleepiness. There is another situation, especially the elderly, because there is high blood pressure, cerebral arteriosclerosis, cerebral blood supply insufficiency phenomenon, after entering the spring may be skin and muscle blood vessel diastole, the blood supply will increase, will also lead to spring sleepiness phenomenon occurs.