Can not play the spirit, always want to sleep for the following reasons: 1, physiological reasons: common is to stay up late at night the crowd is not well rested, no spirit during the day, if it is caused by staying up late, it is recommended to improve the routine, try to go to bed early and get up early. In addition, some people have been poor sleep habits for years, sleep quality has been poor or night dreams, which will also lead to poor rest at night, and then sleepy during the day; 2, pathological reasons: there are some people who are obese, usually snoring at night, and snoring is actually a manifestation of respiratory obstruction, which can lead to brain hypoxia, brain hypoxia at night will also be manifested as poor rest, in the next day occurred Sleepy situation. In addition to snoring, if the body lacks hormones will also have an impact, more common is hypothyroid patients, due to the lack of thyroxine leading to a slowdown in the metabolism of the whole body, may appear drowsy during the day.