Sleepiness all the time depends on whether it is a long-term situation or appears suddenly. If it is a long-term situation, some of them are due to different personal constitution and age, and the required sleep time is different. If it is a sudden love of sleep, we should consider the factors of disease caused by the following: 1, cerebral ischemia, hypoxia: cerebral ischemia, hypoxia caused, accompanied by weakness, general anemia. The most common clinical is cerebrovascular disease damage to the brain nerve, will make people appear drowsy, and therefore patients will show love sleep; 2, hypothyroidism: because hypothyroidism will slow down the metabolism, will also appear love sleep, general weakness; 3, tired: if the recent more tired, poor rest, may also lead to patients love sleep.